Search found 169 matches

by GM Tech
Sun Aug 16, 2020 1:46 am
Forum: Automotive Air Conditioning Forum
Topic: 2003Envoy XL Dual AC 4.2L Weak Cooling
Replies: 3
Views: 503

Re: 2003Envoy XL Dual AC 4.2L Weak Cooling

65% of mobile a/c complaints are due to lack of cooling due to loss of refrigerant......put that in your pipe and smoke it!

This is from my 5200 car database....
by GM Tech
Sun Aug 16, 2020 1:43 am
Forum: Automotive Air Conditioning Forum
Topic: Oil Balance Question
Replies: 9
Views: 562

Re: Oil Balance Question

If it makes you feel any better- just know that absolutely every automotive compressor built was installed in its vehicle home with the entire system charge amount of oil in its belly! So I'm not a big fan of oil distribution upon repairs. I worked for Delphi for 30 years and have been in every N. A...
by GM Tech
Sat Jul 18, 2020 2:04 am
Forum: Automotive Air Conditioning Forum
Topic: Jeep Liberty AC Compressor question
Replies: 10
Views: 1220

Re: Jeep Liberty AC Compressor question

It is not the engine warming that does it so much as the coil warming--the resistance has to increase and the windings get warm- both by engine heat and more so by electrical resistance...
by GM Tech
Tue Jul 14, 2020 10:37 am
Forum: Automotive Air Conditioning Forum
Topic: Help identifying an odd fitting
Replies: 3
Views: 409

Re: Help identifying an odd fitting

Under that adapter is the original R-12 fitting--they only did the low side adapter--some folks are lazy....
by GM Tech
Tue Jul 14, 2020 10:34 am
Forum: Automotive Air Conditioning Forum
Topic: Jeep Liberty AC Compressor question
Replies: 10
Views: 1220

Re: Jeep Liberty AC Compressor question

This is a real common scenario- seen it numerous times. Clutch air gap has worn too wide such that the magnetic pull of the coil cannot pull in clutch driver after the coil warms- and electrical resistance increases. To prove this, next time it "should be running" tap on front of clutch wi...
by GM Tech
Sun May 17, 2020 12:59 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 silverado ac drier frosts up
Replies: 4
Views: 1570

Re: 99 silverado ac drier frosts up

Frosty A/D is Bad? News to me. Really humid conditions shows great cooling....
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: 2261

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: 4
Views: 2683

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: 1798

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: 2134

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...

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