Can't recharge AC
04-01-2022, 08:47 PM
#31
With that said, having successfully gotten my '85's AC to work, i can genuinely say that it is a lot more work than one would think. First off, on my car, it appeared that someone just used 134a without converting it properly because the AC compressor was a gooey mess, which is the result of mineral oil and PAG oil mixing together.. The last pic on post #24 looks like the same gooey mess in the metal line, but I could be mistaken. IF that it is a gooey mess, then that is rubbery gunk floating through the entire AC system.
In my situation, I saw an amazing amount of that same gunk in the compressor when I went to reseal it. I was stunned at how rubbery everything was. It was so bad then I ended up sticking both halves of the compressor into a ultrasound tank to make sure there was no remaining residue (didn't seem to affect the mechanicals). What a mess. After that, i had a hose shop rebuild the hoses that connected to the compressor. I also decided to replace the expansion valve and drier since I didn't trust them knowing that the gummy residue had been in the system. Since everything was off, I took the opportunity of flushing all the metal lines, condenser and evaporator. By then, the pressure switch was the only part left to replace so why not. 
