Air Conditioning System?

GABRIELBURKY

MEMBER
2007 SUBARU FORESTER
2.5L
4 CYL
4WD
AUTOMATIC
99,500 MILES

Hello,

Was watching your YouTube videos. I am replacing a few parts on my car for the air conditioning due to age and the compressor is starting to become noisy. This is preventative maintenance.

I am unsure of how much compressor oil (mine takes PAG 100 R134a) to add to the components during this recharge. I am replacing the compressor, condenser, drier/accumulator, and the expansion valve. I will evacuate, replace parts, and recharge. My compressor comes pre-filled with R134a oil.

I asked a technician at the Subaru dealership how much compressor oil I should add on top of that. He said nothing, the compressor and what is used to refill comes with enough oil. However, I was reading online, and guys think that you should add 1 ounce for every component that is replaced.

I was wondering what your thoughts might be.

Thanks,

Gabriel

3 Replies

MATHGEN

MECHANIC
128 POSTS

Most new compressors come charged with enough PAG oil for the entire system. So it should cover all the components that you intend to replace. I found a few places that list the total capacity to be 6.0 oz. For your vehicle. You can always drain the new compressor oil into a clean measuring device to be sure. Note that the compressor will not fully drain all of the oil, but you will be able to get a good idea.