Alan, I changed mine over to Freeze-12 last spring. It is composed of 80% 134A and 20% something else. Straight 134A operates under a lot higher pressure than R12. Freeze-12 is in between. Have the AC tech pull a good vac, add a little ester oil (for the 134) and in theory add 80% of what the R12 charge would be. Using gages for pressure is best. I did not change any O rings, receiver/dryer, or anything else. My AC cools just as good as it did with the R12 (cold air). The only difference I have noticed is that I have to keep the Ac switch thermostat turned up a little higher than with the R12. Because of the pressure differences the compressor cycles off and on a little more often. Ken Wilford convinced me to use Freeze-12 and knows a lot more about it than I do.
Randy Herd 86 GL Weekender 68 Kombi 98 Jeep Cherokee _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com |
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