Air Conditioning System?

2007 SUBARU FORESTER
99,500 MILES • 2.5L • 4 CYL • 4WD • AUTOMATIC
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GABRIELBURKY
  • MEMBER
  • 2 POSTS
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
Jun 21, 2023 at 1:09 PM
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MATHGEN
  • ✓ASE Certified Mechanic
  • 128 POSTS
  • ASE Certified Mechanic
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.
Jun 23, 2023 at 7:07 AM
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GABRIELBURKY
  • MEMBER
  • 2 POSTS
Thank you for the quick reply and great car advice. I really appreciate this service I have found. Very helpful, thanks again!
Jun 24, 2023 at 6:19 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

You are very welcome. I'm glad to know you got what was needed. If you have other questions, feel free to let us know.

Take care,

Joe
Jun 26, 2023 at 10:14 PM
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