Search found 163 matches

by GM Tech
Sun Sep 15, 2019 7:14 pm
Forum: Automotive Air Conditioning Forum
Topic: Dodge Diesel Trucks Poor AC Performance
Replies: 2
Views: 617

Re: Dodge Diesel Trucks Poor AC Performance

Diesels run much slower rpms than gasoline-- so the compressor hardly ever goes above 2000 rpm- and they idle much slower as well
by GM Tech
Sun Sep 01, 2019 4:19 am
Forum: Automotive Air Conditioning Forum
Topic: Expert help needed PLS!
Replies: 2
Views: 69

Re: Expert help needed PLS!

It is a diode- J cars used diodes in compressor circuit. Since you can engage compressor by jumping relay, it is obvious your issue is upstream. Look at the high side transducer- you know it is a transducer because it has 3 wires (upside down near top of radiator) look for wires loose, broken, also ...
by GM Tech
Thu Aug 22, 2019 10:51 pm
Forum: Automotive Air Conditioning Forum
Topic: 2001 gmc yukon 1500
Replies: 4
Views: 141

Re: 2001 gmc yukon 1500

On trucks with issues after parts have been replaced, I always look for 2 orifice tubes in system- most all condensers have an OT in their outlet connection- yet rear air systems have their OT at the split (to rear) in the liquid line outlet--- so If you bought a new condenser- chances are real good...
by GM Tech
Mon Aug 12, 2019 6:49 am
Forum: Automotive Air Conditioning Forum
Topic: 2010 aveo flush issue?
Replies: 4
Views: 77

Re: 2010 aveo flush issue?

Maybe a couple of weeks of vacuum....Never put anything in a system, that you can't get out. GM says to flush with refrigerant for that very reason...but you used a flushing agent that is a chemical degreaser and now you can't get it out.....Who ever sold you that flush does not realize the mess you...
by GM Tech
Tue Aug 06, 2019 7:53 am
Forum: Automotive Air Conditioning Forum
Topic: 2009 GMC Arcadia compressor starts and stops
Replies: 3
Views: 88

Re: 2009 GMC Arcadia compressor starts and stops

Your Arcadia is well known for evaporator leaks--to fix is a dash pull- I've seen a few and done a few- about a 10 hour job. Look for green dye in the drain hose- under gas pedal under the truck.
by GM Tech
Sat Aug 03, 2019 6:22 pm
Forum: Automotive Air Conditioning Forum
Topic: losing all refrigerant over night.
Replies: 4
Views: 87

Re: losing all refrigerant over night.

My money is on the rear a/c lines leaking at a grommet most likely right at the rear wheel. Look for oily greasy leak,,,
by GM Tech
Sat Jul 20, 2019 7:07 am
Forum: Automotive Air Conditioning Forum
Topic: V5 Compressor Question
Replies: 7
Views: 158

Re: V5 Compressor Question

It wasn't until 2002 model year for V-5 compressors went to double lip seals...
by GM Tech
Fri May 03, 2019 12:30 pm
Forum: Automotive Air Conditioning Forum
Topic: V5 control valve
Replies: 8
Views: 1157

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: 1227

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: 869

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.....

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