If converting to R134a (recommended) this site has lots of good info:
http://www.delanet.com/~pparish/retrofit.htm I replaced the failed compressor on my 88 L4 last summer & converted to 134a at the same time. Changed all the O-rings, dryer and orifice tube. Flushed hoses, evaporator and condenser (one at a time while all disconnected) with the solvent made for this that comes in spray cans (HCFC 141B) and blew everything out with compressed air. Did this several times on some parts till no sign of dirt blown on a white cloth at opposite end. The hardest part to clean was the muffler cavity in the hose near the compressor. Washed and back washed that hose several times. Took the nose piece off to get to the condenser fittings. Used 8 oz of PAG oil (don’t get that stuff on your hands!) Borrowed a neighbor’s vacuum pump & pulled system down for an hour. Left gauges on overnight to make sure there were no leaks, then charged system with 32 oz (corrected 7-7-03, was 23) of 134a. All pressures are in the normal range and it cools very well. Found the best prices on parts at RMACC Hose Company. They are at 67th Ave and Olive in Peoria, AZ so that would be a ways for you to go. The dryer there cost half of the best price I could find anywhere else. Also could have saved at least 50 bucks on the compressor if I had purchased it there. Their phone number is 623-776-7710. If you need an AC hose, that’s also the place to go. Take in your old one and they will replace the flexible part & reuse your fittings. Very reasonable.
[This message has been edited by spark1 (edited 06-21-2003).]
[This message has been edited by spark1 (edited 07-07-2003).]
