Automotive Air Conditioning Information Forum (Archives)

Provided by www.ACkits.com

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

O-Ring not sealing

lehyumaz on Fri October 05, 2012 12:10 PM User is offline

Year: 1998
Make: Mitsubishi
Model: Galant
Engine Size: 2.4
Refrigerant Type: R-134A
Ambient Temp: 100
Pressure Low: 40
Pressure High: 200
Country of Origin: United States

O-ring at evaporator to suction hose will hold a vacuum but leaks under pressure. Possible cause(s)?
Yuma AZ.

-------------------------
lee henderson

mk378 on Fri October 05, 2012 2:18 PM User is offline

Wrong size o-ring, o-ring damaged during installation, or metal parts damaged or corroded.

GM Tech on Fri October 05, 2012 4:21 PM User is offline

wrong size o-ring- obviously moves and does not compress..need at least 12-19% compression in a joint for a good o-ring seal. Try a bigger cross-sectioned one.

-------------------------
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......

lehyumaz on Fri October 05, 2012 6:45 PM User is offline

Thank you MK and GM. Just tried larger O-ring with same effect. Will try to locate and install new suction hose, then evaporator if required. will reply when complete.

-------------------------
lee henderson

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.