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system leak

joe_mn on Wed July 29, 2009 12:15 PM User is offline

Year: 1996
Make: caddy
Model: seville

still working on the caddy. put in used compressor last year. ran fine. cold air. but i have a leak now. did put in new sealing washers. added uv dye but cannot find any evidence of leak. no signs of dye anywhere. condenser looks bone dry. inlet manifold on driver side is dry. system held charge fine with old compressor but leaks with different compressor. would there be any signs of leakage on case or behind clutch? i rarely get any condensation drip from evap so i can't really check fluid for green tint.

GM Tech on Wed July 29, 2009 12:48 PM User is offline

Caddys should already have a double lip seal if your compressor is not painted OEM or used unit-- most aftermarket folks used a single lip seal and paint their units-- common leak location is the compressor belly-o-rings leak due to corrosion in sealing surface (non-painted)- hard to get to on a Caddy- use your black light and UV glasses (Autozone $12.95) after you have dye in system- will probably give itself away...as leak location....

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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......

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