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Well, I didn't have much knowledge of air conditioning when I decide to retrofit my '91 4runner. I asked the guy at the auto parts store and he recommended a kit and gave me some advice. I went home, read the instructions (they were very easy) and had my system retrofitted/recharged in less than 10 minutes. I didn't drain any oil or replace any gaskets. It is working very well and I have had no trouble with it at all. I did not even realize all the stuff that some people do to their a/c until I read the answers on this site. Basic procedure : First evacuate the system of all R-12 Freon. Remove the compressor and drain all the oil out (R134 uses different types of oil). Go to your local parts store and purchase a retro fit kit (it should have o-rings, fitting adapters,oil and R134a). Be sure to also purchase a new Accumulator (receiver/dryer). Be sure to have a vacuum pump to get any moisture out of the system before you add the R134a. I would also go to your local library for a book to help you with the process.

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โˆ™ 2008-11-30 17:02:01
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Q: What needs to be changed to replace R12 freon in a '92 Toyota with R134 freon?
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