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So it's April in Arizona, which means I have about -30 days to get my AC fixed. To recap from sometime last year, I did the R-152a conversion on my system, new oil/dye/dryer/o-rings, etc. Consistently, the charge (read: blowing cold) would only last two months tops. After vacuuming out and refilling though, high- and low-side pressures were always in perfect range, and obviously the compressor cycled appropriately and the clutch sounded fine. The problem is that there's a loving leak somewhere and I can't find it even with the dye in the system. Will it be in my best interests to go to a shop that does "A/C leak tests" and see what equipment/methods they use? I'm assuming that the simplest way to find the leak would be to empty the system, then put pressure into it via nitrogen or the like, rather than trying to hold it under vacuum. Hell, I don't even need a shop to do the work for me afterwards; I just need to find out which goddamn hose, fitting or whatever to replace. Maybe the condenser. Who knows. Reminder: 1985 RX-7, originally R-12; with R-152a it had vent temps of 38 Fahrenheit. When it worked, it worked.
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Apr 18, 2014 07:44
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| # ¿ May 13, 2024 23:15 |
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Motronic posted:The other place I've found "leaks that I can't find with dye" are the drat valve cores of the service ports. Because you expect them to have dye on them already. Funny thing: I actually replaced the valve cores in October the last time I charged the system. Didn't seem to help. About a year ago when I had the blower motor removed to check it out, I also shined my UV light all over the evaporator and didn't find anything. It's frustrating as hell.
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Apr 19, 2014 06:05
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