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Necoa #: 716
Location: 13(TX)
Joined: Mar 18, 2003
Posts: 194
Year: 1985
Model: El Camino
Posted: Sun Aug 31, 2008 8:44 pm Post subject: R12 to R134 conversion experts - please step in
1985. Converted from R12 to R134. Flushed system, replaced accumulator and orifice and new compressor. Evacuated system for about 45 minutes. Added 3 cans of 134. All is working well - making cold air. Gauges Showing 30#'s on low side with idle at 1000 RPM's. All of my other cars show 35#'s but they came with R134 systems. Also, I have water condensate all the way back to the compressor. What is normal low side pressure for conversions?
Thanks _________________ 77 HD Sportster
79 Corvette L82
85 El Camino SS LG4
93 Camaro Z28 LT1
05 Dodge Caravan daily driver - yeah baby!
Necoa #: 716
Location: 13(TX)
Joined: Mar 18, 2003
Posts: 194
Year: 1985
Model: El Camino
Posted: Mon Sep 01, 2008 12:05 am Post subject:
Thanks Doug. Yes, I used 8 oz of PAG150. Poured about 2/3 into the compressor, the other 1/3 into the accumulator. Turned the compressor over a couple of dozen times by hand before initial startup. The 30#'s seemed like it might be a little low but I didn't want to flood the compressor with liquid. _________________ 77 HD Sportster
79 Corvette L82
85 El Camino SS LG4
93 Camaro Z28 LT1
05 Dodge Caravan daily driver - yeah baby!
25# is just a bit low and 45# is about the limit. So 30# looks OK to me. As long as you don't get too much head pressure and the system is cooling well and not cycling too often, I think you have it pretty much nailed. Good job, enjoy.
Doug _________________ 85 El Camino 305, TH350, K&N, dual exhausts
87 El Camino 305, 2004R, K&N, dual exhausts
1964-1/2 Mustang conv, 260 V8, dual exhausts
2002 Jaguar XJ8, 2000 Harley Road King
Lakewood, CO
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