Hello all. I'm hoping I can get some guidance on a repair.
I have a 1988 Toyota MR2 Supercharged that I've been slowly restoring over the last 7 years. When I got the car the AC system was completely empty, and one of the schrader valves had a R134 adapter on it. Very strange. Since I didn't know the state of anything I wanted to get things at a good starting point.
I replaced the drier and expansion valve. Flushed the lines, condenser and evaporator with Duraflush. Removed the compressor and flushed with mineral oil several times to remove whatever oil was there to the best of my ability. I also replaced all the orings in the system and added the correct mineral oil charge with some UV dye. I wanted to replace the compressor but the correct one was not available from anywhere I looked.
I had the system pumped down then recharged with R12. Temperatures and pressures were good, so I called it "fixed".
Now, 7 years later, I can see some UV oil on the snout of the compressor. I looked again and found a rebuilt compressor is available. However, it seems that all the rebuilt compressors assume that you will be using R134. This compressor says it has PAG oil already in it. Am I safe to flush the new compressor with mineral oil, then install, or is there something else I need to do to guarantee compatibility of the new compressor with R12.
And, of course, the R12 in the current system will be recovered before the repair.
Thanks in advance for any advice.
Mike M.
I have a 1988 Toyota MR2 Supercharged that I've been slowly restoring over the last 7 years. When I got the car the AC system was completely empty, and one of the schrader valves had a R134 adapter on it. Very strange. Since I didn't know the state of anything I wanted to get things at a good starting point.
I replaced the drier and expansion valve. Flushed the lines, condenser and evaporator with Duraflush. Removed the compressor and flushed with mineral oil several times to remove whatever oil was there to the best of my ability. I also replaced all the orings in the system and added the correct mineral oil charge with some UV dye. I wanted to replace the compressor but the correct one was not available from anywhere I looked.
I had the system pumped down then recharged with R12. Temperatures and pressures were good, so I called it "fixed".
Now, 7 years later, I can see some UV oil on the snout of the compressor. I looked again and found a rebuilt compressor is available. However, it seems that all the rebuilt compressors assume that you will be using R134. This compressor says it has PAG oil already in it. Am I safe to flush the new compressor with mineral oil, then install, or is there something else I need to do to guarantee compatibility of the new compressor with R12.
And, of course, the R12 in the current system will be recovered before the repair.
Thanks in advance for any advice.
Mike M.
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