Search found 156 matches

by GM Tech
Fri May 03, 2019 12:30 pm
Forum: Automotive Air Conditioning Forum
Topic: V5 control valve
Replies: 8
Views: 419

Re: V5 control valve

I've never seen the control valve leak-- always the case halves (belly leaker) scenario. Corrosion crawls up and under the cylinder halves o-rings and cause the leak. I take the compressor apart, sand down the corroded area and put new o-rings in, and have never had a comeback.
by GM Tech
Sat Apr 27, 2019 7:20 am
Forum: Automotive Air Conditioning Forum
Topic: 96 caddy AC issue
Replies: 8
Views: 596

Re: 96 caddy AC issue

My money is on the shaft seal-- look for oily/greasy slinging oil traces/debris anywhere near the front of compressor- like on radiator hose or frame...they were famous for this issue. And holding vacuum doesn't always mean it can hold refrigerant......
by GM Tech
Thu Apr 11, 2019 2:00 am
Forum: Automotive Air Conditioning Forum
Topic: Very Little Cooling
Replies: 6
Views: 385

Re: Very Little Cooling

Low side at 70?? Whoa Nelly- there-in lies your problem. Nothing cools at 70 low side- should be near 25-35. I suspect your variable compressor control valve is bad-- You can change it yourself- while it is on the car normally- just has to have system discharged.....
by GM Tech
Wed Feb 27, 2019 1:36 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Fresh air infiltration while in Recirculate Mode
Replies: 2
Views: 1004

Re: Fresh air infiltration while in Recirculate Mode

Can't you see the recirc door move? or hear the difference when you command it to move either way? I have also used light weight plastic wrap to see if it clings to recirc screen/filter when it should.....have had a few lack of air flow issues with plastic wraps clinging to the recirc entrance....
by GM Tech
Wed Feb 27, 2019 1:03 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: New to forum, looking for input on where to introduce PAG oil
Replies: 9
Views: 1893

Re: New to forum, looking for input on where to introduce PAG oil

I worked where we made the compressors you are talking about-- viscosity of oil will not cause harm- is not a big deal- they went back and forth- and when push came to shove, they used whatever oil most easily fit the bill- cost wise. I am more concerned when you say you flushed your system---why oh...
by GM Tech
Wed Feb 27, 2019 12:30 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: 134A R4 conversion seal failure?
Replies: 1
Views: 232

Re: 134A R4 conversion seal failure?

The seal leaks because it is not a double lip type seal. All GM shaft seals went to double lip style in '96- so you can replace the seal with a seal kit you can easily buy online. The type of refrigerant is not what causes the leaky shaft seals.
by GM Tech
Fri Feb 22, 2019 12:03 pm
Forum: Automotive Air Conditioning Forum
Topic: A6 compressor shaft seal
Replies: 5
Views: 3177

Re: A6 compressor shaft seal

That steel ring must be a replacement for the original ceramic ring design. I was not aware aftermarket went to a steel ring- since I don't use it anyway. Must be cheaper to use steel other than ceramic. Anyway, you throw the steel ring away as well...all you need is a double lip seal like what goes...
by GM Tech
Sun Feb 17, 2019 3:29 pm
Forum: Automotive Air Conditioning Forum
Topic: A6 compressor shaft seal
Replies: 5
Views: 3177

Re: A6 compressor shaft seal

Throw the ceramic seal and metal bird cage assembly away- the new double lip seal seats on a shoulder. the o-ring goes in the deep o-ring groove just above the shoulder, and the snap ring groove is the upper groove. The snap ring holds the new lip seal tight against the shoulder seat.
by GM Tech
Wed Jan 23, 2019 9:59 pm
Forum: Automotive Air Conditioning Forum
Topic: R4 ac compressor shaft seal for 1980 Corvette
Replies: 4
Views: 3191

Re: R4 ac compressor shaft seal for 1980 Corvette

That whole assembly can be replaced with the new style double lip seal used in newer R-4, HD, and V-5 applications..Done it many times...
by GM Tech
Tue Oct 30, 2018 3:01 am
Forum: Automotive Air Conditioning Forum
Topic: Time sensitive question, 97 tahoe W/O rear air
Replies: 2
Views: 5255

Re: Time sensitive question, 97 tahoe W/O rear air

wtf--- 45 degree ambient and you say pump is bad......????? Of course it kicks out right away, there is nothing to do....pump will only run when system pressure exceeds 47 psi-- and your ambient is right on top of that. Switches are doing their job.. Your truck is not a refrigerator- don't expect co...

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