Search found 116 matches

by GM Tech
Wed Jun 21, 2017 6:40 pm
Forum: Automotive Air Conditioning Forum
Topic: ? On a 1997 Nissan maxima
Replies: 2
Views: 39

Re: ? On a 1997 Nissan maxima

Number one failure mode of mobile a/c is lack of cooling due to loss of refrigerant-- 65% of what I see has lost some refrigerant-- so start there- always- remove and weigh refrigerant- compare to under hood sticker- chances are good you have half a charge or less-- then evacuate system-pulling a va...
by GM Tech
Tue Jun 20, 2017 6:42 pm
Forum: Automotive Air Conditioning Forum
Topic: Now I have a leak !!! 1998 Frontier
Replies: 3
Views: 64

Re: Now I have a leak !!! 1998 Frontier

Your a/c inop is not due to your leak if you have intermittent cold air!! Two separate issues! The next time you have hot air blowing- tap on front of compressor clutch driver- see if it engages- if so you have the infamous wide air gap scenario...and we can expand on it later..
by GM Tech
Fri Jun 16, 2017 7:20 pm
Forum: Automotive Air Conditioning Forum
Topic: V5 shaft seal leak
Replies: 2
Views: 69

Re: V5 shaft seal leak

I've never had this issue- and have resealed hundreds of V-5s. I assume you are using double lip seal shaft seals. If in doubt, go ahead and polish the shaft- fine emory cloth or metal polish. there is a chance leak is from shaft seal o-ring- If wrong size was used- there-in lies the problem- hopefu...
by GM Tech
Fri Jun 16, 2017 9:24 am
Forum: Automotive Air Conditioning Forum
Topic: Should AC Clutch Coil Be Hot
Replies: 3
Views: 93

Re: Should AC Clutch Coil Be Hot

Normal to get wlarm- I'd put a 10 amp fuse in-line and test it for 30 minutes- if fuse doesn't blow- you're golden.-- Although you have already quoted a good amp reading-
by GM Tech
Wed Jun 07, 2017 6:21 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Suburban Rear Evap Help
Replies: 11
Views: 242

Re: 99 Suburban Rear Evap Help

With rear systems 99% of the time it is in the lines- I would never have looked at rear evap- they are just that rare to leak--there should be dye dripping from the leak- and bubbling when charged- I've had people tell me they see a big green spot on their garage floor- at the rear of vehicle! Yes, ...
by GM Tech
Tue Jun 06, 2017 3:30 pm
Forum: Automotive Air Conditioning Forum
Topic: Dye on 17 year old Delphi 6628
Replies: 9
Views: 161

Re: Dye on 17 year old Delphi 6628

Notorious "Belly Leaker" ditto the above comments- corrosion has grown under the seals of the belly o-rings- and caused your leak- I've resealed 100's of these- but you need the proper tools and know-how to do it- otherwise a new compressor is at hand....
by GM Tech
Wed May 31, 2017 5:17 am
Forum: Automotive Air Conditioning Forum
Topic: Testing for leaks
Replies: 4
Views: 162

Re: Testing for leaks

How's the airflow out the vents? That era C cars were prone to evaporator leaks- where the refrigerant oil would leach out of the air inlet face of evaporator and collect dust and dirt that passed through it- virtually plugging up all air flow- It should blow your hair off your forehead- but I have ...
by GM Tech
Sat May 27, 2017 6:21 pm
Forum: Automotive Air Conditioning Forum
Topic: 95 Chevy G20
Replies: 12
Views: 269

Re: 95 Chevy G20

The connection you have pictured is the "upfitters" connection- the panel van came from the factory with front air only and a dead-head connection for the "upfitter's" conection to screw into. You see, the factory sold the panel van to an "Upfitter" or conversion compan...
by GM Tech
Sat May 27, 2017 6:05 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressure testing
Replies: 1
Views: 112

Re: Pressure testing

The best way to leak test is with a sniffer and UV dye- You can add a couple ounces of refrigerant to up the pressure to 80 psi or so-- the dye will tell you where it leaks- just not when it leaks- which is a good thing. Dodge trucks of your era are famous for evaporator leaks- so a sniffer in the v...
by GM Tech
Fri May 26, 2017 6:44 pm
Forum: Automotive Air Conditioning Forum
Topic: Frustrating 2010 Jeep Grand with 5.7
Replies: 13
Views: 300

Re: Frustrating 2010 Jeep Grand with 5.7

Vacuum is the absence of atmospheric pressure- so it can only be that with no atmospheric pressure- it can vary based on sea level...as does the atmospheric pressure

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