WDoherty

The rebuilt compressor on my 92 sc400 is noisy so I am replacing it with an new Denso unit while I'm in there doing some other work. I will be using R-134a. I already ordered and received the new Denso compressor for a 92 Denso #4711150. Then i started thinking that maybe i should use the compressor for a 94 DENSO Part # 4711215 since it was already switched to R-134a, but i didn't want to have any fitment/sensor/ plug issues. What's the difference between the compressors. Btw i ran r134a on the original compressor and rebuilt and they blew ice cold. They both had a whine though, but the car's a/c didn't work when i got it so i think that compressor was already damaged and the other was a $100 rebuild off ebay so i think it was never right from the beginning, but still blows cold, just whines and its annoying.

Vwpride12

The electrical plugs will be the same, when you convert a system to r134 from r12 you change the pressure fittings on the high and low side. Make sure there is oil in your compressor before you install it. You dont need a lot, maybe a straw full. Make sure you replace the receiver dryer also, its denso part# 478-0107 for the sc4 that is the filter for your system. Oh, r12 is crazy expensive if you can find it, so use r134. The prices dropped a lot this year. Last year a 30 gallon tank was over 200 and now they are around 80. It looks like there is a fitting on the compressor itself, just switch them over from your compressor that was already converted to 134.

WDoherty

Thanks VWPride. Your right all the fittings are already converted to r134a. I've also already have the new denso dryer. My question is more along the lines of what the difference is between the Denso compressor for r12 and the later version for r134a. If its just the oil, I will drop out the r12 oil outta of the new compressor and replace with oil for r134a. If there were more significant differences I would return the 92 DENSO Part # 4711150 compressor and order the 94 DENSO Part # 4711215 version. I've come down with a nasty virus so I'm down for awhile anyway.

chingpo05

iTrader: (2)

if youre in houston i have a oem compressor for 40 bux :-) they are virtually the same the only difference is the oil and standards for o rings. when doing the conversion you would use ester oil/ conversion oil, change all o rings, drier and freon

1slowsc

iTrader: (2)

Does anyone know if a 99 sc300 vvti ac compressor will fit a 92 non vvti sc300?