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2000 Cavalier Suddenly Warm

mjohnson2981 on Tue August 19, 2008 7:11 PM User is offline

Year: 1999
Make: Chevy
Model: Cavalier
Engine Size: 2.2
Refrigerant Type: R134a
Ambient Temp: 85
Pressure Low: 28
Pressure High: 105
Country of Origin: United States

I haven't spent time with the vehicle yet, but am a little puzzled in my thinking...

1999 or 2000 Cavalier 2.2l (don't know for sure - not sure there is a difference)
Suddenly went warm - all at once
Compressor & Drier were changed by the owner about a year ago.

Pressures hold steady, no compressor flutter, no clutch cycling during short inspection.

Accumulator doesn't feel cold, compressor discharge is warmer than ambient.

It happened all at once so I was told

Equalized pressure was about 75 and equalizes decently quick (maybe 20 - 30 seconds)

Was it a sudden blow out of freon? I would think Equalized pressure should be around 90-95 with this ambient...

Thanks for any help.

GM Tech on Wed August 20, 2008 7:54 AM User is offline

Looks like you've lost a lot of refrigerant- Those J-Cars cool very good with the right amount of charge in them- Look for an oily/greasy shaft seal area of the compressor- or a body leak ("belly") of the compressor-- these are the most common leak areas...

Allso - clutch won't cycle on a variable stroke compressor system like yours- this is by design

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Edited: Wed August 20, 2008 at 9:10 AM by GM Tech

NickD on Wed August 20, 2008 8:12 AM User is offline

Makes a guy want to trade in his 99 for a 69 when compressors were mounted high in the engine compartment. With these things dragging on the ground now, not only miserable to work on, but exposed to all kinds of road salt for corrosion damage as well. Is this an improvement? Ha, on some vehicles, had to add about 30 cents worth of refrigerant each year and was good to go for another year, that was before all this EPA crap that is causing a lot more damage than good.

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