The aircon on the Mx-5 wasn't working, a quick test showed a lack of
gas. I got a local guy to look at it, he was going to re-gas it, but
couldn't pull a vacuum on the system so it obviously had a bad leak. The
compressor was the obvious suspect being the most expensive part,
pulling the pipes off the compressor and sealing them produced a good
vacuum so the compressor it was. It was changed and the system
gassed,but no cooling, there was a ton of pressure on the compressor
output, but a vacuum on the inlet, so there was a blockage. When the
filter was pulled-

https://imgur.com/a/qFo50K7

Well it did it's job for 32 years. Nice cool air now.
--
Clocky on programming 18 Feb 2022
"What, you copy and paste code into a sketch in Arduino, select the
libraries to include, modify it a bit and hit program"

Clocky on NASA 18 Mar 2022
"Oh, and btw... if you worked for NASA how is it thay you are seemingly
oblivious to Commodore Amigas used at NASA"

On 14/3/2023 9:21 pm, Keithr0 wrote:
> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
> gas. I got a local guy to look at it, he was going to re-gas it, but
> couldn't pull a vacuum on the system so it obviously had a bad leak. The
> compressor was the obvious suspect being the most expensive part,
> pulling the pipes off the compressor and sealing them produced a good
> vacuum so the compressor it was. It was changed and the system
> gassed,but no cooling, there was a ton of pressure on the compressor
> output, but a vacuum on the inlet, so there was a blockage. When the
> filter was pulled-
>
> https://imgur.com/a/qFo50K7
>
> Well it did it's job for 32 years. Nice cool air now.

The receiver dryer (AC filter) is a regular service item and has, in
many cases, regular replacement intervals. Some say to replace the
receiver dryer every second year, but I think that's overkill. However
it would be advisable to replace the receiver dryer whenever the AC
circuit has been opened. A couple of reasons for that. Since AC systems
are not generally opened up at regular intervals, generally only when
something ceases to function, so it will be likely the filter is
clogged. The other reason is that it is the means by which any *residual
moisture* is removed. There's a dessicant in there that has a finite
life and, by opening it up, you expose it to atmospheric moisture
anyway. In Queensland this time of year, that would be a lot of
moisture. Golden rule - always install a new receiver dryer when the
compressor is replaced, and always when a serious leakage has been
noticed and repaired. Remember, serious leakages can allow moisture
laden air in once pressure drops to zilch. Note too that the AC will
have ceased to function long before this as there is a low pressure
warning switch in the system which will disable it should pressure drop
below a set threshold.

FWIW, the blockage should never have become an issue - the receiver
dryer should *automatically* have been replaced when the new compressor
was fitted. They are cheap and, more importantly, they are vital to AC
system operation.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/03/2023 9:21 pm, Keithr0 wrote:
> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
> gas. I got a local guy to look at it, he was going to re-gas it, but
> couldn't pull a vacuum on the system so it obviously had a bad leak. The
> compressor was the obvious suspect being the most expensive part,
> pulling the pipes off the compressor and sealing them produced a good
> vacuum so the compressor it was. It was changed and the system
> gassed,but no cooling, there was a ton of pressure on the compressor
> output, but a vacuum on the inlet, so there was a blockage. When the
> filter was pulled-
>
> https://imgur.com/a/qFo50K7
>
> Well it did it's job for 32 years. Nice cool air now.

You got your money's worth out of it.

--
--
--
Regards,
Noddy.

On 14/3/2023 10:09 pm, Noddy wrote:
> On 14/03/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
> You got your money's worth out of it.
>
If it had been changed regularly, he'd have been able to run the
compressor for a lot longer. That receiver dryer is likely what *killed*
the compressor in the first place.

You know SFA about AC, that much is evident.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/3/2023 9:21 pm, Keithr0 wrote:
> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
> gas. I got a local guy to look at it, he was going to re-gas it, but
> couldn't pull a vacuum on the system so it obviously had a bad leak. The
> compressor was the obvious suspect being the most expensive part,
> pulling the pipes off the compressor and sealing them produced a good
> vacuum so the compressor it was. It was changed and the system
> gassed,but no cooling, there was a ton of pressure on the compressor
> output, but a vacuum on the inlet, so there was a blockage. When the
> filter was pulled-
>
> https://imgur.com/a/qFo50K7
>
> Well it did it's job for 32 years. Nice cool air now.

LOL, that filter looks a bit stuffed:-)
BTW do you ever use the AC with the top down?
I've done it a few times and if its a bit warm you get a nice cool
breeze but the AC works pretty hard because no way can it get down to
the set temp so I wonder if its bad for the AC system?

--
Daryl

On 14/3/2023 10:09 pm, Noddy wrote:
> On 14/03/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
> You got your money's worth out of it.
>
>
He certainly did:-)

--
Daryl

On 14/3/2023 10:42 pm, Daryl wrote:
> On 14/3/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
>
> LOL, that filter looks a bit stuffed:-)
> BTW do you ever use the AC with the top down?
> I've done it a few times and if its a bit warm you get a nice cool
> breeze but the AC works pretty hard because no way can it get down to
> the set temp so I wonder if its bad for the AC system?
>
You wonder???? Don't you know how the AC system works either? If you
have the cabin closed and the AC on recirc, you will increase the *off*
cycle since the cabin air gets cooler - and tends to stay cooler. That
means the AC clutch will be disengaged for longer and the compressor
will be *idle*. If, on the other hand, you have the fresh air mode on,
or the roof down (same shit), then the cabin will heat up quicker (or
never cool down) thereby *shortening* the *off cycle* meaning the AC
compressor will be running longer. So, yes, it will be working harder
and will, ultimately, shorten the AC life span.

You're supposed to be a *qualified mechanic* ergo you should know this
shit. This is so damn basic!

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/03/2023 9:42 pm, Daryl wrote:
> On 14/3/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
>
> LOL, that filter looks a bit stuffed:-)
> BTW do you ever use the AC with the top down?
> I've done it a few times and if its a bit warm you get a nice cool
> breeze but the AC works pretty hard because no way can it get down to
> the set temp so I wonder if its bad for the AC system?
>
Yes, it does help on a hot day, OTOH the heater on a cold day with the
top down makes a bigger difference.
--
Clocky on programming 18 Feb 2022
"What, you copy and paste code into a sketch in Arduino, select the
libraries to include, modify it a bit and hit program"

Clocky on NASA 18 Mar 2022
"Oh, and btw... if you worked for NASA how is it thay you are seemingly
oblivious to Commodore Amigas used at NASA"

On 14/03/2023 9:07 pm, Xeno wrote:
> On 14/3/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
> The receiver dryer (AC filter) is a regular service item and has, in
> many cases, regular replacement intervals. Some say to replace the
> receiver dryer every second year, but I think that's overkill. However
> it would be advisable to replace the receiver dryer whenever the AC
> circuit has been opened. A couple of reasons for that. Since AC systems
> are not generally opened up at regular intervals, generally only when
> something ceases to function, so it will be likely the filter is
> clogged. The other reason is that it is the means by which any *residual
> moisture* is removed. There's a dessicant in there that has a finite
> life and, by opening it up, you expose it to atmospheric moisture
> anyway. In Queensland this time of year, that would be a lot of
> moisture.

Pumping the system down with the vacuum pump should boil off any
moisture in the system.

Golden rule - always install a new receiver dryer when the
> compressor is replaced, and always when a serious leakage has been
> noticed and repaired. Remember, serious leakages can allow moisture
> laden air in once pressure drops to zilch. Note too that the AC will
> have ceased to function long before this as there is a low pressure
> warning switch in the system which will disable it should pressure drop
> below a set threshold.
>
> FWIW, the blockage should never have become an issue - the receiver
> dryer should *automatically* have been replaced when the new compressor
> was fitted. They are cheap and, more importantly, they are vital to AC
> system operation.
>

--
Clocky on programming 18 Feb 2022
"What, you copy and paste code into a sketch in Arduino, select the
libraries to include, modify it a bit and hit program"

Clocky on NASA 18 Mar 2022
"Oh, and btw... if you worked for NASA how is it thay you are seemingly
oblivious to Commodore Amigas used at NASA"

On 14/03/2023 9:29 pm, Xeno wrote:
> On 14/3/2023 10:09 pm, Noddy wrote:
>> On 14/03/2023 9:21 pm, Keithr0 wrote:
>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>> The compressor was the obvious suspect being the most expensive part,
>>> pulling the pipes off the compressor and sealing them produced a good
>>> vacuum so the compressor it was. It was changed and the system
>>> gassed,but no cooling, there was a ton of pressure on the compressor
>>> output, but a vacuum on the inlet, so there was a blockage. When the
>>> filter was pulled-
>>>
>>> https://imgur.com/a/qFo50K7
>>>
>>> Well it did it's job for 32 years. Nice cool air now.
>>
>> You got your money's worth out of it.
>>
> If it had been changed regularly, he'd have been able to run the
> compressor for a lot longer. That receiver dryer is likely what *killed*
> the compressor in the first place.
>

The car was built in 1991 so the compressor was 32 years old, I don't
see that as a premature failure.

> You know SFA about AC, that much is evident.

Really?
>

--
Clocky on programming 18 Feb 2022
"What, you copy and paste code into a sketch in Arduino, select the
libraries to include, modify it a bit and hit program"

Clocky on NASA 18 Mar 2022
"Oh, and btw... if you worked for NASA how is it thay you are seemingly
oblivious to Commodore Amigas used at NASA"

On 14/3/2023 11:09 pm, Keithr0 wrote:
> On 14/03/2023 9:07 pm, Xeno wrote:
>> On 14/3/2023 9:21 pm, Keithr0 wrote:
>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>> The compressor was the obvious suspect being the most expensive part,
>>> pulling the pipes off the compressor and sealing them produced a good
>>> vacuum so the compressor it was. It was changed and the system
>>> gassed,but no cooling, there was a ton of pressure on the compressor
>>> output, but a vacuum on the inlet, so there was a blockage. When the
>>> filter was pulled-
>>>
>>> https://imgur.com/a/qFo50K7
>>>
>>> Well it did it's job for 32 years. Nice cool air now.
>>
>> The receiver dryer (AC filter) is a regular service item and has, in
>> many cases, regular replacement intervals. Some say to replace the
>> receiver dryer every second year, but I think that's overkill. However
>> it would be advisable to replace the receiver dryer whenever the AC
>> circuit has been opened. A couple of reasons for that. Since AC
>> systems are not generally opened up at regular intervals, generally
>> only when something ceases to function, so it will be likely the
>> filter is clogged. The other reason is that it is the means by which
>> any *residual moisture* is removed. There's a dessicant in there that
>> has a finite life and, by opening it up, you expose it to atmospheric
>> moisture anyway. In Queensland this time of year, that would be a lot
>> of moisture.
>
> Pumping the system down with the vacuum pump should boil off any
> moisture in the system.

Moisture gets in the system over time even with it sealed. Anyway,
removing the receiver dryer, or the hoses, admits air into the system
and it floods the dessicant in the receiver dryer. You remove it, you
automatically replace it *regardless*. Definitely replace it if you have
the system open at all and don't know the car's history.
>
> Golden rule - always install a new receiver dryer when the
>> compressor is replaced, and always when a serious leakage has been
>> noticed and repaired. Remember, serious leakages can allow moisture
>> laden air in once pressure drops to zilch. Note too that the AC will
>> have ceased to function long before this as there is a low pressure
>> warning switch in the system which will disable it should pressure
>> drop below a set threshold.
>>
>> FWIW, the blockage should never have become an issue - the receiver
>> dryer should *automatically* have been replaced when the new
>> compressor was fitted. They are cheap and, more importantly, they are
>> vital to AC system operation.
>>
>

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/03/2023 11:21 pm, Keithr0 wrote:
> On 14/03/2023 9:29 pm, Xeno wrote:
>> On 14/3/2023 10:09 pm, Noddy wrote:
>>> On 14/03/2023 9:21 pm, Keithr0 wrote:
>>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>>> The compressor was the obvious suspect being the most expensive
>>>> part, pulling the pipes off the compressor and sealing them produced
>>>> a good vacuum so the compressor it was. It was changed and the
>>>> system gassed,but no cooling, there was a ton of pressure on the
>>>> compressor output, but a vacuum on the inlet, so there was a
>>>> blockage. When the filter was pulled-
>>>>
>>>> https://imgur.com/a/qFo50K7
>>>>
>>>> Well it did it's job for 32 years. Nice cool air now.
>>>
>>> You got your money's worth out of it.
>>>
>> If it had been changed regularly, he'd have been able to run the
>> compressor for a lot longer. That receiver dryer is likely what
>> *killed* the compressor in the first place.
>>
>
> The car was built in 1991 so the compressor was 32 years old, I don't
> see that as a premature failure.

Lol :) No one would, apart from people looking to make morons out of
themselves :)

>> You know SFA about AC, that much is evident.
>
> Really?

I think he was talking to Krypsis. The voices in his head must be
deafening...

--
--
--
Regards,
Noddy.

On 14/03/2023 10:42 pm, Daryl wrote:
> On 14/3/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
>
> LOL, that filter looks a bit stuffed:-)

I'd want a partial refund. It's put in a relative short one :)

> BTW do you ever use the AC with the top down?
> I've done it a few times and if its a bit warm you get a nice cool
> breeze but the AC works pretty hard because no way can it get down to
> the set temp so I wonder if its bad for the AC system?

I wouldn't think so.

--
--
--
Regards,
Noddy.

On 14/03/2023 11:09 pm, Keithr0 wrote:
> On 14/03/2023 9:07 pm, Xeno wrote:

>>
>> The receiver dryer (AC filter) is a regular service item and has, in
>> many cases, regular replacement intervals. Some say to replace the
>> receiver dryer every second year, but I think that's overkill. However
>> it would be advisable to replace the receiver dryer whenever the AC
>> circuit has been opened. A couple of reasons for that. Since AC
>> systems are not generally opened up at regular intervals, generally
>> only when something ceases to function, so it will be likely the
>> filter is clogged. The other reason is that it is the means by which
>> any *residual moisture* is removed. There's a dessicant in there that
>> has a finite life and, by opening it up, you expose it to atmospheric
>> moisture anyway. In Queensland this time of year, that would be a lot
>> of moisture.
>
> Pumping the system down with the vacuum pump should boil off any
> moisture in the system.

It does, which is one of the reasons why you do it, but the moisture
enters the system once you open it and once the drier is exposed to an
open system it's performance is severely compromised.

Don't listen to this google expert fuckwit. *No one* replaces driers as
a "regular service item", but at any time when the system is opened they
should be changed. They're very inexpensive.

--
--
--
Regards,
Noddy.

On 14/3/2023 11:21 pm, Keithr0 wrote:
> On 14/03/2023 9:29 pm, Xeno wrote:
>> On 14/3/2023 10:09 pm, Noddy wrote:
>>> On 14/03/2023 9:21 pm, Keithr0 wrote:
>>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>>> The compressor was the obvious suspect being the most expensive
>>>> part, pulling the pipes off the compressor and sealing them produced
>>>> a good vacuum so the compressor it was. It was changed and the
>>>> system gassed,but no cooling, there was a ton of pressure on the
>>>> compressor output, but a vacuum on the inlet, so there was a
>>>> blockage. When the filter was pulled-
>>>>
>>>> https://imgur.com/a/qFo50K7
>>>>
>>>> Well it did it's job for 32 years. Nice cool air now.
>>>
>>> You got your money's worth out of it.
>>>
>> If it had been changed regularly, he'd have been able to run the
>> compressor for a lot longer. That receiver dryer is likely what
>> *killed* the compressor in the first place.
>>
>
> The car was built in 1991 so the compressor was 32 years old, I don't
> see that as a premature failure.

Had the receiver dryer been changed at intervals, the compressor seal
wouldn't have been chewed out and the compressor would likely *still* be
in service. The receiver dryer being blocked because it was never
serviced is what killed the AC compressor - guaranteed.

The receiver dryer is one of the most important devices in the AC
system. It has an number of roles:
It retains and isolates moisture and contaminants from the system
It finalises and ensures condensation of the AC refrigerant
It compensates for variations in fluid volume
It ensures oil returns to the compressor

Just take that last point. If the receiver dryer is *blocked*, not only
will the refrigerant gas have difficulty flowing through the system, so
will the *oil*. How long do you think the AC compressor last if the oil
flow to it is compromised? Remember, the oil flows with the refrigerant.
If you don't replace receiver drier, unwanted moisture will screw up
the lubrication of the AC system by compromising the oil. That in and of
itself will shorten the compressor's life. The unwanted moisture runs
the risk of internal corrosion and that's bad. Any unfiltered particles
allowed to freely circulate the loop will eventually clog up the
system's various components; TX valve, condenser and evaporator. It
could also cause the compressor to seize up.

As I said, the receiver dryer is a *service item* and should be replaced
regularly. It should *always* be replaced whenever the system is opened.
Ergo, it should *automatically* have been replaced when the AC tech
first opened your AC system.
>
>> You know SFA about AC, that much is evident.
>
> Really?
>>
>
Yep, really.

Automotive AC work is a *licenced* sub-component of the automotive
trade, even in Victoria. I had the licence at one stage but I let it
lapse a couple of decades back.

Just for you;

An Automotive Air Conditioning Licence is valid for two or
three years from the date of issue. Under the Australian
Government’s Ozone Protection and Synthetic Greenhouse Gas
Management Regulations 1995 it is an offence of strict
liability to handle refrigerant without a Refrigerant
Handling Licence.

I had the full licence which I received when I did the update course at
Richmond. Because of the continual changes, back then, it became a
requirement to update at regular intervals. Keeps the shonks out of the
system. I still have my gauge set out in the garage - found it the other
day. Not good enough now, needs to be accompanied by a refrigerant
recovery unit. At this stage of my life I can't see myself buying one of
those. ;-)

But I initially did AC way back during the 60s and 70s as part of my
apprenticeship, as all automotive apprentices of that era and since
would have done. I would have thought Daryl would also have done AC at
that time. Given his comments in another post, maybe not. Anyway, Darren
never did *any apprenticeship* so he has never done AC and he isn't
licenced anyway. He *runs away* from *exams* and you have to pass exams
in order to become licenced for AC work. He can bleat all he likes but
unless he shows absolute undeniable proof of his claims, he remains a
*liar*.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 15/3/2023 7:59 am, Noddy wrote:
> On 14/03/2023 10:42 pm, Daryl wrote:
>> On 14/3/2023 9:21 pm, Keithr0 wrote:
>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>> The compressor was the obvious suspect being the most expensive part,
>>> pulling the pipes off the compressor and sealing them produced a good
>>> vacuum so the compressor it was. It was changed and the system
>>> gassed,but no cooling, there was a ton of pressure on the compressor
>>> output, but a vacuum on the inlet, so there was a blockage. When the
>>> filter was pulled-
>>>
>>> https://imgur.com/a/qFo50K7
>>>
>>> Well it did it's job for 32 years. Nice cool air now.
>>
>>
>> LOL, that filter looks a bit stuffed:-)
>
> I'd want a partial refund. It's put in a relative short one :)
>
>> BTW do you ever use the AC with the top down?
>> I've done it a few times and if its a bit warm you get a nice cool
>> breeze but the AC works pretty hard because no way can it get down to
>> the set temp so I wonder if its bad for the AC system?
>
> I wouldn't think so.
>
Thanks for proving you don't have a clue.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 15/3/2023 8:05 am, Noddy wrote:
> On 14/03/2023 11:09 pm, Keithr0 wrote:
>> On 14/03/2023 9:07 pm, Xeno wrote:
>
>>>
>>> The receiver dryer (AC filter) is a regular service item and has, in
>>> many cases, regular replacement intervals. Some say to replace the
>>> receiver dryer every second year, but I think that's overkill.
>>> However it would be advisable to replace the receiver dryer whenever
>>> the AC circuit has been opened. A couple of reasons for that. Since
>>> AC systems are not generally opened up at regular intervals,
>>> generally only when something ceases to function, so it will be
>>> likely the filter is clogged. The other reason is that it is the
>>> means by which any *residual moisture* is removed. There's a
>>> dessicant in there that has a finite life and, by opening it up, you
>>> expose it to atmospheric moisture anyway. In Queensland this time of
>>> year, that would be a lot of moisture.
>>
>> Pumping the system down with the vacuum pump should boil off any
>> moisture in the system.
>
> It does, which is one of the reasons why you do it, but the moisture
> enters the system once you open it and once the drier is exposed to an
> open system it's performance is severely compromised.
>
> Don't listen to this google expert fuckwit. *No one* replaces driers as
> a "regular service item", but at any time when the system is opened they
> should be changed. They're very inexpensive.
>
That's what *I* said Darren. Now you are parroting my words. What people
do and what they are required to do are two different things. The normal
interval for receiver dryer replacement back in the day was 2 - 5 years.
I would do it less frequently than that. My Toy is now 7 years old, I
was thinking a few weeks back that I might get it vacced down and
regassed this year. Natch the receiver dryer will be replaced at that time.

Did I mention that failure to replace the *fuel filter* on fuel injected
cars will also kill the fuel pump *through cavitation*. It's not just AC
compressors that die through lack of maintenance.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/3/2023 11:21 pm, Keithr0 wrote:
> On 14/03/2023 9:29 pm, Xeno wrote:
>> On 14/3/2023 10:09 pm, Noddy wrote:
>>> On 14/03/2023 9:21 pm, Keithr0 wrote:
>>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>>> The compressor was the obvious suspect being the most expensive
>>>> part, pulling the pipes off the compressor and sealing them produced
>>>> a good vacuum so the compressor it was. It was changed and the
>>>> system gassed,but no cooling, there was a ton of pressure on the
>>>> compressor output, but a vacuum on the inlet, so there was a
>>>> blockage. When the filter was pulled-
>>>>
>>>> https://imgur.com/a/qFo50K7
>>>>
>>>> Well it did it's job for 32 years. Nice cool air now.
>>>
>>> You got your money's worth out of it.
>>>
>> If it had been changed regularly, he'd have been able to run the
>> compressor for a lot longer. That receiver dryer is likely what
>> *killed* the compressor in the first place.
>>
>
> The car was built in 1991 so the compressor was 32 years old, I don't
> see that as a premature failure.

Far from it, its actually exceptionally good for it to last that long,
even more so when you live in a warm climate so the AC would be used
frequently.

--
Daryl

On 15/3/2023 7:56 am, Noddy wrote:
> On 14/03/2023 11:21 pm, Keithr0 wrote:
>> On 14/03/2023 9:29 pm, Xeno wrote:
>>> On 14/3/2023 10:09 pm, Noddy wrote:
>>>> On 14/03/2023 9:21 pm, Keithr0 wrote:
>>>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack
>>>>> of gas. I got a local guy to look at it, he was going to re-gas it,
>>>>> but couldn't pull a vacuum on the system so it obviously had a bad
>>>>> leak. The compressor was the obvious suspect being the most
>>>>> expensive part, pulling the pipes off the compressor and sealing
>>>>> them produced a good vacuum so the compressor it was. It was
>>>>> changed and the system gassed,but no cooling, there was a ton of
>>>>> pressure on the compressor output, but a vacuum on the inlet, so
>>>>> there was a blockage. When the filter was pulled-
>>>>>
>>>>> https://imgur.com/a/qFo50K7
>>>>>
>>>>> Well it did it's job for 32 years. Nice cool air now.
>>>>
>>>> You got your money's worth out of it.
>>>>
>>> If it had been changed regularly, he'd have been able to run the
>>> compressor for a lot longer. That receiver dryer is likely what
>>> *killed* the compressor in the first place.
>>>
>>
>> The car was built in 1991 so the compressor was 32 years old, I don't
>> see that as a premature failure.

Nobody said anything about premature failure. What I stated was that the
compressor would have lasted much longer and be running *still* had the
system been serviced occasionally. That's what I said in my response
above. Lack of maintenance was the killer.
>
> Lol :) No one would, apart from people looking to make morons out of
> themselves :)

You made a moron out of yourself - and that started way back when you
made those bullshit claims of 3 apprenticeships and 2 trade
qualifications. And the bullshit has flowed forth thick and fast ever since.
>
>>> You know SFA about AC, that much is evident.
>>
>> Really?
>
> I think he was talking to Krypsis. The voices in his head must be
> deafening...
>
The voices in your head certainly are!

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/03/2023 8:51 PM, Keithr0 wrote:
> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
> gas. I got a local guy to look at it, he was going to re-gas it, but
> couldn't pull a vacuum on the system so it obviously had a bad leak. The
> compressor was the obvious suspect being the most expensive part,
> pulling the pipes off the compressor and sealing them produced a good
> vacuum so the compressor it was. It was changed and the system
> gassed,but no cooling, there was a ton of pressure on the compressor
> output, but a vacuum on the inlet, so there was a blockage. When the
> filter was pulled-
>
> https://imgur.com/a/qFo50K7
>
> Well it did it's job for 32 years. Nice cool air now.
WTF Dryer change in mandatory every time the system is regased. If
the compressor fails you should replace the TX valve and flush the
system. Where did you AC man get his license?

On 15/3/2023 6:15 pm, DBR wrote:
> On 14/03/2023 8:51 PM, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>   WTF  Dryer change in mandatory every time the system is regased. If
> the compressor fails you should replace the TX valve and flush the
> system. Where did you AC man get his license?

From a weeties packet is my guess. Probably another Noddy without any
qualifications whatsoever.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 15/3/2023 6:15 pm, DBR wrote:
> On 14/03/2023 8:51 PM, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>   WTF  Dryer change in mandatory every time the system is regased.

It is, first I've heard that and it didn't happened the last few times
I've had a system regassed, the most recent was last November and no
parts were changed.

If
> the compressor fails you should replace the TX valve and flush the
> system.

Keiths compressor didn't actually fail.

--
Daryl

On 15/3/2023 10:06 pm, Daryl wrote:
> On 15/3/2023 6:15 pm, DBR wrote:
>> On 14/03/2023 8:51 PM, Keithr0 wrote:
>>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>>> gas. I got a local guy to look at it, he was going to re-gas it, but
>>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>>> The compressor was the obvious suspect being the most expensive part,
>>> pulling the pipes off the compressor and sealing them produced a good
>>> vacuum so the compressor it was. It was changed and the system
>>> gassed,but no cooling, there was a ton of pressure on the compressor
>>> output, but a vacuum on the inlet, so there was a blockage. When the
>>> filter was pulled-
>>>
>>> https://imgur.com/a/qFo50K7
>>>
>>> Well it did it's job for 32 years. Nice cool air now.
>>    WTF  Dryer change in mandatory every time the system is regased.
>
> It is, first I've heard that and it didn't happened the last few times

You haven't worked in the automotive trade for *decades* Daryl, of
course you've never heard of it. Funny thing, I used to *teach* AC to
apprentices and I've heard of it. Why did you think I mentioned a 2 year
service interval here in an earlier post. That is what is recommended!
Why do you think I made the point the receiver dryer gets replaced every
time the system is vacced down and regassed? Have you ever, in your time
in the trade, studied or worked on AC systems? My guess is not.

> I've had a system regassed, the most recent was last November and no
> parts were changed.

You were ripped off! The job wasn't done properly. You can't *inspect* a
receiver dryer (sealed unit) and they do deteriorate over time. Just
wait until that dessicant breaks down, then you'll be in a world of pain
with your non-working AC system.
>
>  If
>> the compressor fails you should replace the TX valve and flush the
>> system.
>
> Keiths compressor didn't actually fail.
>
Keith's compressor *did fail*. The gas leaked out of it.

>>> The compressor was the obvious suspect being the most
>>> expensive part, pulling the pipes off the compressor
>>> and sealing them produced a good vacuum so the
>>> compressor it was. It was changed and the system ...

FFS, you have a short memory and extremely poor cognition skills. Best
not even mention your *diagnostic skills* - or lack of them. That leak
would have been at the input shaft seal - the point of primary leak
potential. It began leaking because the extreme vacuum created in the
compressor crankcase/camcase by the clogged receiver dryer sucked crap
through the seal and chewed it out through *abrasion*.

Also, all that particulate matter in the receiver dryer came from
somewhere. Have a guess where! If you answered the *compressor*, you
would be spot on. It's (one of) the receiver dryers function to remove
that crap from the system so it doesn't score all the working parts in
the compressor and clog up orifices. That receiver dryer is the *perfect
example* of why you should consider it a *service item*.

Unbelievable!

----
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 14/3/2023 9:21 pm, Keithr0 wrote:
> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
> gas. I got a local guy to look at it, he was going to re-gas it, but
> couldn't pull a vacuum on the system so it obviously had a bad leak. The
> compressor was the obvious suspect being the most expensive part,
> pulling the pipes off the compressor and sealing them produced a good
> vacuum so the compressor it was. It was changed and the system
> gassed,but no cooling, there was a ton of pressure on the compressor
> output, but a vacuum on the inlet, so there was a blockage. When the
> filter was pulled-
>
> https://imgur.com/a/qFo50K7
>
> Well it did it's job for 32 years. Nice cool air now.

Well Keith, the discussion subsequent to this post of yours proved a
number of things. The *important* thing it proved is that there are some
*pretenders* here who don't have a clue. That even applies to the
supposed mechanic to whom you took your MX5.

Refer to your link, did you ever wonder what that black goo is that's
coating the interior of the receiver dryer? We in the motor trade call
it the *black death*. Whose death, you might well ask. Your AC system's
death is the answer. Black death is that gooey looking sludge that gums
up your entire AC system - the compressor, condenser, evaporator and
everything else in your system. You have opened up only one component.
Rest assured that gooey black sludge will be in every other part of the
system. That black death destroys all the components and *everything*
must be either replaced, or flushed clean. As you might imagine, this
can be a rather expensive exercise which can be avoided by the simple
expedient of *regular maintenance*. In this case, said regular
maintenance consists of a vac down and a regas, replacement of the
receiver dryer and a final pressure check at, say, 5 year intervals.
Simplez, eh? I normally service AC around the 6 - 8 year mark but, until
recently disposed of cars before the need arose. My current Toyota looks
like being kept a lot longer given the scarcity of new cars so - next
service the AC will be done. And I'll replace the receiver dryer at the
same time.

R134a (and R12) becomes acidic when mixed with moisture. The acid formed
then corrodes the aluminium in the lines, condenser, evaporator and
parts of the compressor. The AC system is being eaten away from the
inside out and that is why your evaporator or condenser suddenly
develops *pinholes* for no apparent reason. The corroded aluminium mixes
with the refrigerant and the oil and the *mixture* is then subjected to
temperature extremes. The end result is that gooey black sludge that, in
the case of your MX5, quite literally choked your AC system to death.
All quite preventable too, all it needed was an occasional *service* and
receiver dryer replacement. Did I mention that the oxidation causes
breakdown of the *oil* which definitely compromises the longevity of the
compressor, guaranteed.

There's a number of reasons why you would seek to replace that receiver
dryer at regular intervals. The first is that, as you can see, moisture
*will* get into the system in spite of the manufacturer's best efforts
to prevent it. It is the receiver dryer's task to *store* that moisture
safely out of harms way where it cannot damage the AC system. As such,
it has a finite capacity and you need to replace it *before* that
capacity is exceeded. The receiver dryer also contains a particulate
filter and it too has a capacity limit. An AC system maintained in good
condition should never exceed that limit but, allow moisture to commence
the corrosion process and you will be simultaneously *creating* a heap
of particulate matter which will overload the filter in the receiver
dryer. Finally, the desiccant in the receiver dryer doesn't last
forever. It will break down over time and release particulate matter
into the AC system. When that has occurred, the AC system will require a
full flush.

I'm assuming your MX5 has an R12 system, the changeover to R134a
occurring circa 1995. It's getting difficult to source R12 these days
making servicing a tad difficult. You might want to check to see if the
system has been retrofitted to R134a. You might also want to check if
your system was flushed. If not, then your entire system will be
contaminated by that 'orrible black goo. Remember, it was *generated* in
all the alloy bits and bobs that were exposed to the *acid*. Just
because it was caught by, and blocked up, the receiver dryer doesn't
mean the entire system won't be contaminated. BTW, expect pinholes to
develop in both the evaporator and the condenser over the rest of your
ownership of that MX5, that corrosive process will be ongoing whether
your car is parked up or on the road.

Ah, there's a lot to be said for *preventative maintenance*.

--
Xeno

Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)

On 16/03/2023 10:59 am, Xeno wrote:
> On 14/3/2023 9:21 pm, Keithr0 wrote:
>> The aircon on the Mx-5 wasn't working, a quick test showed a lack of
>> gas. I got a local guy to look at it, he was going to re-gas it, but
>> couldn't pull a vacuum on the system so it obviously had a bad leak.
>> The compressor was the obvious suspect being the most expensive part,
>> pulling the pipes off the compressor and sealing them produced a good
>> vacuum so the compressor it was. It was changed and the system
>> gassed,but no cooling, there was a ton of pressure on the compressor
>> output, but a vacuum on the inlet, so there was a blockage. When the
>> filter was pulled-
>>
>> https://imgur.com/a/qFo50K7
>>
>> Well it did it's job for 32 years. Nice cool air now.
>
> Well Keith, the discussion subsequent to this post of yours proved a
> number of things. The *important* thing it proved is that there are some
> *pretenders* here who don't have a clue. That even applies to the
> supposed mechanic to whom you took your MX5.

One of the things that people dislike about your posts is their
patronising tone, you aren't lecturing to a class of pimply teenage
wouldbe mechanics. I note the phrase below "We in the motor trade". By
your own admission, you haven't worked in the motor trade for several
decades, being one of those who, in mid life, found teaching others an
easier life than doing the job yourself, so that has to be considered
somewhat of a case of self aggrandisement.

> Refer to your link, did you ever wonder what that black goo is that's
> coating the interior of the receiver dryer? We in the motor trade call
> it the *black death*. Whose death, you might well ask. Your AC system's
> death is the answer. Black death is that gooey looking sludge that gums
> up your entire AC system - the compressor, condenser, evaporator and
> everything else in your system. You have opened up only one component.
> Rest assured that gooey black sludge will be in every other part of the
> system. That black death destroys all the components and *everything*
> must be either replaced, or flushed clean. As you might imagine, this
> can be a rather expensive exercise which can be avoided by the simple
> expedient of *regular maintenance*. In this case, said regular
> maintenance consists of a vac down and a regas, replacement of the
> receiver dryer and a final pressure check at, say, 5 year intervals.
> Simplez, eh? I normally service AC around the 6 - 8 year mark but, until
> recently disposed of cars before the need arose. My current Toyota looks
> like being kept a lot longer given the scarcity of new cars so - next
> service the AC will be done. And I'll replace the receiver dryer at the
> same time.

Interesting that this reply came to you 3 days after my original post,
in which time you mad 10 other replies. the term "Black death" comes up
on a Google search several times and gives the impression, rightly or
wrongly, that you've just discovered it there.

> R134a (and R12) becomes acidic when mixed with moisture. The acid formed
> then corrodes the aluminium in the lines, condenser, evaporator and
> parts of the compressor. The AC system is being eaten away from the
> inside out and that is why your evaporator or condenser suddenly
> develops *pinholes* for no apparent reason. The corroded aluminium mixes
> with the refrigerant and the oil and the *mixture* is then subjected to
> temperature extremes. The end result is that gooey black sludge that, in
> the case of your MX5, quite literally choked your AC system to death.
> All quite preventable too, all it needed was an occasional *service* and
> receiver dryer replacement. Did I mention that the oxidation causes
> breakdown of the *oil* which definitely compromises the longevity of the
> compressor, guaranteed.

It didn't choke the system to death, it choked the filter, the rest of
the system was flushed with little result. This compressor lasted 32
years, as against the one in my 1991 Corolla Twin Cam which lasted 6, so
I am not too disappointed with it's performance.

Then there was the aircon in my Cordia, driving it one day, there was an
explosion under the bonnet followed by clouds of steam. On of the hoses
had blown off. Why? Because the qualified Mitsubishi mechanic who
installed it decided to mount the fan relay upside down. Right way up,
it was waterproof, upside down it wasn't. The relay was full of water,
it didn't pull in when required, the fan didn't start and bang.

> There's a number of reasons why you would seek to replace that receiver
> dryer at regular intervals. The first is that, as you can see, moisture
> *will* get into the system in spite of the manufacturer's best efforts
> to prevent it. It is the receiver dryer's task to *store* that moisture
> safely out of harms way where it cannot damage the AC system. As such,
> it has a finite capacity and you need to replace it *before* that
> capacity is exceeded. The receiver dryer also contains a particulate
> filter and it too has a capacity limit. An AC system maintained in good
> condition should never exceed that limit but, allow moisture to commence
> the corrosion process and you will be simultaneously *creating* a heap
> of particulate matter which will overload the filter in the receiver
> dryer. Finally, the desiccant in the receiver dryer doesn't last
> forever. It will break down over time and release particulate matter
> into the AC system. When that has occurred, the AC system will require a
> full flush.

Which it has had.

> I'm assuming your MX5 has an R12 system, the changeover to R134a
> occurring circa 1995.

It was R12 because it had the old type ports, it has now been changed
over to R134A

> It's getting difficult to source R12 these days
> making servicing a tad difficult. You might want to check to see if the
> system has been retrofitted to R134a. You might also want to check if
> your system was flushed. If not, then your entire system will be
> contaminated by that 'orrible black goo. Remember, it was *generated* in
> all the alloy bits and bobs that were exposed to the *acid*.

See above

> Just
> because it was caught by, and blocked up, the receiver dryer doesn't
> mean the entire system won't be contaminated. BTW, expect pinholes to
> develop in both the evaporator and the condenser over the rest of your
> ownership of that MX5, that corrosive process will be ongoing whether
> your car is parked up or on the road.

We will see.

> Ah, there's a lot to be said for *preventative maintenance*.

That depends, I have seen a lot of problems caused by "Preventative
maintenance".

--
Clocky on programming 18 Feb 2022
"What, you copy and paste code into a sketch in Arduino, select the
libraries to include, modify it a bit and hit program"

Clocky on NASA 18 Mar 2022
"Oh, and btw... if you worked for NASA how is it thay you are seemingly
oblivious to Commodore Amigas used at NASA"