A/C Line question
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
A/C Line question
On one of the A/C lines on my 94, the valve is leaking. It doesn't look like a standard schraeder valve like on most cars (and on the other line, for that matter) but like some sort of black rubber diaphragm. It appears that the rubber is split around the edge, and when you take the cap off, you can see and hear it leaking there. Does the valve unbolt from the hard line, and if so, is it separately servicable, or do I just need to replace the line?
Safety Car
Joined: Jul 2004
Posts: 3,838
Likes: 30
On one of the A/C lines on my 94, the valve is leaking. It doesn't look like a standard schraeder valve like on most cars (and on the other line, for that matter) but like some sort of black rubber diaphragm. It appears that the rubber is split around the edge, and when you take the cap off, you can see and hear it leaking there. Does the valve unbolt from the hard line, and if so, is it separately servicable, or do I just need to replace the line?
Thread Starter
Drifting
Joined: Dec 1999
Posts: 1,330
Likes: 36
From: Waynesboro, PA
Co-winner 2020 C4 of the Year - Modified
I've already lost some of the charge, no big deal, it's 134A. I know about the schraeder valve, and the other line has one. This fitting does not have a schraeder valve in it. When you take the cap off, you see a black rubber boot in the hole. The edge of the boot appears to be torn or separated from the fitting, and it is leaking out of there. When you pull up on the boot with a pick, you can see a flat piece of metal, but definitely no schraeder valve. Maybe this was something they tried on the 94's? It was the first year of 134A refrigerant. I just don't know why it isn't on both lines. I guess I'm gonna have to replace the line. I hope it's still available. Anyone else with a 94 have this on their line?
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
R134 uses quick connect fittings and those are serviceable. You will need a R134 gage set to service the system. The only thing on the high side line should be that fitting and a Pressure Sensor (3 wire). Parts and images are available at www.acdelco.com but looking at the hose, I only see the high side fitting. Low side is built into the accumulator. Anyway, caps and schraders are listed and shown so hopefully you can find what you need. NAPA probably has replacement parts also - www.napaautoparts.com
