86 MkIII A/C charging help

batmmannn · 07-03-2010, 05:31 AM

Did my first AC evac and charge today. Went OK. My Ac is working. Should be interesting to see how long it lasts.

When I took off my compressor it had no oil. It was seized. Should I have assumed that the entire system would be dry or near dry of oil. I put about 4 ozs in the drier and the 4 in the compressor. I didn't want to go more in case there was a few ozs still in the condensor, lines and other parts of the system. Being that the compressor was bone dry should I have gone a full 10 ozs? My $9.99 AC compressor off ebay is working just fine and apparently not leaking.

Sight glass is not clear even after 3 cans of refrigerant. When the clutch disengages I see foam, when it reingages and is running I got a bubble or two about 180 psi on the high side and about 34 on the low side.

I did evacuate it down to -29psi and the vacuum held fine for like an hour and a half before I went forward and charged it. What do you guys think?

I didn't want to flush it. Besides I figured I would do this one and test for leaks. I used the same oil and refrigerant it had in it before I started on it. Put on a new drier, but man getting that thing bolted back in was a pain in the ass!

What were your results? Should I have added more oil or less?

Thanks

07-03-2010, 05:31 AM	#12
batmmannn 12psi boost Join Date: May 2010 Location: West Virginia Posts: 320	A/c Did my first AC evac and charge today. Went OK. My Ac is working. Should be interesting to see how long it lasts. When I took off my compressor it had no oil. It was seized. Should I have assumed that the entire system would be dry or near dry of oil. I put about 4 ozs in the drier and the 4 in the compressor. I didn't want to go more in case there was a few ozs still in the condensor, lines and other parts of the system. Being that the compressor was bone dry should I have gone a full 10 ozs? My $9.99 AC compressor off ebay is working just fine and apparently not leaking. Sight glass is not clear even after 3 cans of refrigerant. When the clutch disengages I see foam, when it reingages and is running I got a bubble or two about 180 psi on the high side and about 34 on the low side. I did evacuate it down to -29psi and the vacuum held fine for like an hour and a half before I went forward and charged it. What do you guys think? I didn't want to flush it. Besides I figured I would do this one and test for leaks. I used the same oil and refrigerant it had in it before I started on it. Put on a new drier, but man getting that thing bolted back in was a pain in the ass! What were your results? Should I have added more oil or less? Thanks __________________ 1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras My Next project is the Batmobile! Last edited by batmmannn; 07-03-2010 at 05:47 AM.