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#1
08-08-2006, 03:55 PM
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Why not R22?
This is just a hypothetical stupid question (so don't flame me), can an auto a/c system that was running R12 and mineral oil use R22? as a top off or complete fill? Both refrigerants use the same oil, same manifold gauges right? pressure are similar? my R12 30lb is almost gone but I have a full R22 30lb.
I know shops use R22 and nitrogen to pressure test. why would it not work, what problems could one expect?
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1993 Mercedes Benz 300D 2.5 205K (ex wife's) 1984 Mercedes Benz 300SD 320K (SOLD) 2004 Mercedes Benz C240 75K 1995 GMC Sierra 2WD 5.7L 188K 1983 Mercedes Benz 300SD 239K (SOLD) 1987 BMW 325i 220K (SOLD FOR SALVAGE) 609 Certification 
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#2
08-08-2006, 04:05 PM
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The answer you are probably looking for is the pressure of R-22 is to high for a belt driven (r-12)compressor. The other answer is it's illegal.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o) Last edited by TX76513; 08-08-2006 at 04:19 PM.
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#3
08-08-2006, 06:03 PM
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R-22 was desigend for single speed (electrically operated) compressors. R-12 is for multi speed (automotive type) compressors. Now the fun part. R-12 was also used in refridgerators.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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