Quote:
Originally Posted by OlBrenner
Quick background...
Bought car in the winter, a/c didn't work, PO converted to R134, didn't care then, it's about to get VERY hot in AZ, I care now, trying to fix, read below...
No pressure on the low side, I hook up venturi style vacuum pump and manifold to see if there is a leak before I attempt to start replacing everything. My air compressor is kind of lame and I can only get about 19" vacuum on the system however it has been holding that for 4 hours now without a loss. Am I safe in assuming that I don't have a leak? I know you need to pull 29" for hours in order to boil off the water before refilling, but at this point I'm just checking the mechanics.
I also know I'll need to get a new dryer and might as well replace the expansion valve but I'd like to not have to replace the compressor or track down mystery leaks once I do recharge.
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Need more info. If PO had converted, how long ago and did the items listed above get replaced then? Trying to figure out why you assume the drier and expansion valve need to be replaced. Is there any pressure on high side? Is there any refrig in system currently? Have you tried to fill system if the above answers are no? You can purchase or rent a leak detector real cheap, fill the system and check for leaks. Lots of options before just tearing into system and replacing parts just because you think they are bad.
Also FWIW I have done countless A/C systems and have never pulled more than 19 - 21in vac on any system including my own 134A conversion 7 years ago and blow low 30's out of vents in mid summer.
03-08-2008, 09:15 AM
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