Search found 154 matches

by GM Tech
Thu Apr 11, 2019 2:00 am
Forum: Automotive Air Conditioning Forum
Topic: Very Little Cooling
Replies: 6
Views: 116

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: 859

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: 1361

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: 100

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: 3014

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: 3014

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: 3050

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: 5140

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...
by GM Tech
Thu Oct 11, 2018 3:38 am
Forum: Automotive Air Conditioning Forum
Topic: 2010 GMC Sierra cycling strange pressure readings
Replies: 2
Views: 6886

Re: 2010 GMC Sierra cycling strange pressure readings

4 lbs????? sounds like an old suburban dual air----A sierra should be at about 2 lbs-- if no rear evaporator/single system- where is OT? in condenser outlet? or inline in front of evaporator
by GM Tech
Sun Oct 22, 2017 10:09 pm
Forum: Automotive Air Conditioning Forum
Topic: Ford E6DH compressor
Replies: 20
Views: 8943

Re: Ford E6DH compressor

If you are flushing with anything other than refrigerant- then that is most likely your problem. Aftermarket flushing agents are degreasers- and you have to get all the flushing agent out of your system! Merely purging with air, or extended vacuums foes not do this. Your evap and condensers have mul...

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