dukenukemx
Racer
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Oct 20, 2025
- Join DateJun 2018
- Posts:371
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Likes:175
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Liked:38 Times in 29 Posts
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That makes two of us.Originally Posted by monkez
First off, I am a complete noob. I'm an accountant, not a mechanic. If you see contradicting info here, listen to them because they likely have more knowledge than i.
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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.
I have no idea if someone just put back in R12 and even bothered to mix PAG oil with the original mineral oil in the system. I flushed what I could with the exception of the compressor.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.
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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.
I wonder if that's what happened in my situation? I do plan to rebuilt the compressor and by rebuild I mean replace all the seals. Doesn't look to bad to do but I have no idea which compressor I have and therefore which seal kit to buy. The way I look at it the system holds vacuum and seems to work. I have other important things to take care of like the stereo system making noise from what I believe is the alternator, and changing the trans and diff oils. When it does leak then I'm ready to cross that bridge. 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.
