my ac is kinda low on freeon i've been looking on other boards and alot of people are switching over them selfs. however, i have to change all my o rings and what about the oil in the compresser? what tools etc..
I've done the work myself. You have to replace the accumlator/dryer and the orifice tube. Poston carries these parts. The system has to be power flushed of the R-12 and the oil. The original hoses and o-rings can be used. R-134a compatible oil must be used. R-12 to R-134a adapter fittings can be purchased from any auto parts store. You'll need a vacuum pump and gages to recharge the system.