- Dec 14, 2002
- New Jersey
My 82 Mercedes ran R-12 when I got it, and never required top ups for years. It sat for ~6 years, and the charge came out I'm trying to chase down leaks, and one spot I found a potential was the actual schrader valve. I replaced it, used some R-12 Nylog on the threads, and put the new schrader in. Pressurized the system with non-CFC gas as allowed by the EPA, and I see some slow bubbles in the tiny bit of oil sitting in there. This seems unacceptable. I have good metal caps with new o rings, as I've read in the past that the schrader valves aren't really a perfect seal on AC systems. But I'd assume that was relative to slow diffusion, and maybe the higher pressure on the high pressure side. My high side one seems to check out. Fortunately it seems to be the low side, which is front and center in the bay, which might be suspect. Any thoughts? Schrader replacement was new stock. Thanks!