Quote:
Originally Posted by jeff5may
The big things to do are these:
1. Flush everything out with brake cleaner and blow out with compressed air
2. Change the filter/drier
3. Change the orifice out with a new one
4. drain old oil out of compressor
5. change o-rings on fittings you take apart
6. Deep vacuum after leak check
Not doing these things will ensure you have a compressor burnout eventually. I have drained oil out of compressors (still working) that looked like used engine oil. They call it the "black death". I don't care what the salesmen say, old oil and new oil (even the same type) don't play well together.
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POE oil or PAG oil ?
I think the R134a GM systems , from the 1990's & early 1980's I have workoned use PAG oil ( Pag 150 , I think ? ) .
But I have read POE oil is more tolerant of any residual amounts of mineral oil ?
God bless
Wyr