How much pag oil to add to rebuilt 2001 Chevy ac compressor?

Answer 1

You should be able to ask at the autoparts store that the rebuilt compressor came from. Usually a system without rear ac has 8oz. of oil in it if the whole system was evacuated.

You need to add at least a couple onces of PAG oil (probably PAG 150 for yours, but confirm it first) into the suction side of the compressor before you install it, then turn it on the clutch end and let it stand for a few minutes to lube the internal front seal. After that install it and once the lines are connected you must rotate the compressor (make sure you are rotating the compressor and not just the clutch) about 10 times to clear the oil out. If you have any trouble adding the oil to the compressor you can rotate it as you add it to pull it in also.

You then should have replaced the orfice tube and accumulator/receiver/dryer anytime you replace a compressor and you will add a couple onces of oil into the accumulator/receiver/dryer as well before you install the new one. They both are cheap parts normally.

If you replaced the condensor then you need to add a few onces oil into the new one as well.

I dealership might be able to tell you more if you ask the parts or service dept. or your local parts stores etc...