When I was going to reseal my compressor in my 79 Cordoba, found it easier to just get a reman off Rock Auto. Mine wasn't labeled clearly what oil was prefilled in it, so I flushed out with new PAG oil a couple of times to ensure I had compatible oil in it. I went through it checking all bolts and torques. I recall one bolt being incorrect and swapped from my old compressor. Been over 2 years now and that system is crazy cold. I did put a new expansion valve and evap as well, so that I am sure helped.