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Converted R12 to R134... impressions?
Posted by Ryan (more from Ryan) on Fri, 22 Jun 2012 17:34:21
I lived in Seattle for 10 years and never used the A/C in my 1990 9Ks, but moving to Austin has forced my hand. Last summer (90+ days in a row of over 100-degree temps) and a mostly non-functional air conditioner finally broke me. Ever had a seatbelt sweat-strap across your t-shirt when you got out of the car?

This week I pulled the compressor, the hoses, the receiver-drier and the expansion valve. Replaced the latter two, drained the compressor of oil, flushed the hoses and flushed the evaporator and condenser. Replaced all o-rings, put some decent R12 to R134 adaptors on the original Sanden SD-709 compressor fittings. 8 oz. of Castrol ester oil - 4 oz. in the compressor, 2 oz. in the condenser and 2 oz. in the evaporator.

Vacuumed the system for 45 minutes with fingers crossed. No leaks. Charged 30 oz. of R134 and found that my A/C switch was bad. Flipped the "recirculate air" switch over, plugged it into the pigtail, pushed it in, and I've got air conditioning. A new A/C switch is ordered.

For those of you that have converted to R134, what kind of temps are you getting?

This was the first day, and the system may need to equalize a bit, but was blowing 58-degrees while cruising, between 70-80-degrees when stuck in traffic (which is still bliss when it was 100-degrees out today, but I want frickin' snowballs, man). I'm assuming the fan is kicking on because there was almost a full volt drop on the dash gauge (13.4 to 12.5) when I was sitting still with the blower on "3." Will visually confirm tomorrow.

Sorry for the long-wind, just feels like I've become somewhat civilized again having A/C and you guys have been a long, long-time help in everything I've done with this car in the last 10 years.

posted by 24.27.4...
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