A/C leak - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-26-2005, 01:58 AM   #1
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Default A/C leak

Have 92 Bonneville and the high side port is leaking slowly. You can tell from the little bubbles from compressor oil. It looks like some kind of ball valve or something. Is there some way to unstick this valve w/o loosing all the R-12. Thanks
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Old 07-26-2005, 02:00 AM   #2
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Get a screw driver, stand out of the way and press and relaese the valve a couple times and see if that helps maybe?
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Old 07-26-2005, 02:22 AM   #3
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No, don't do that.

Refrigerant, when mixed with A/C oil will bubble. That is normal. Spray some brake cleaner directly into the port for five seconds to clean out the oil and refrigerant, then blow the brake cleaner out with low pressure air (a straw and a mouth).

Then add three or four drops of houshold (sewing machine) oil to the port and watch for bubbles. If you see bubble, the port is leaking.

These ports do not commonly leak, the reason that you see bubbles when removing the cap is because the cap is a seal itself and traps refrigerant and oil in the port after any previous A/C servive.
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Old 07-26-2005, 06:36 AM   #4
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Quote:
Originally Posted by 1fatcat
No, don't do that.

Refrigerant, when mixed with A/C oil will bubble. That is normal. Spray some brake cleaner directly into the port for five seconds to clean out the oil and refrigerant, then blow the brake cleaner out with low pressure air (a straw and a mouth).

Then add three or four drops of houshold (sewing machine) oil to the port and watch for bubbles. If you see bubble, the port is leaking.

These ports do not commonly leak, the reason that you see bubbles when removing the cap is because the cap is a seal itself and traps refrigerant and oil in the port after any previous A/C servive.
I know where you can get a set that held a charg.

http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT
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