A/C work

JAYSINBAKO

MEMBER
1995 OLDSMOBILE 442
3.1L
6 CYL
FWD
AUTOMATIC
44,000 MILES

I am replacing the A/C compressor on my Cutlass Ciera V6. I plan on putting a vacuum on the system after I install the new parts. My question is, will I need to replace the Pag oil that is already in my new compressor after I run the vacuum or will it stay in the unit and only need r134a once the vacuum is complete?

5 Replies

CARADIODOC

MECHANIC
33,871 POSTS

The oil is added before you install the compressor because you may need to hold it a certain way so the fill plug or port is up. Many compressors come with the correct amount of oil already in them. Look for a tag that tells you if you need to add the oil yourself.

Be sure to pull the vacuum for at least a half hour, and even longer if the lines or new compressor were not sealed for more than a few hours.

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Wednesday, April 26th, 2017 AT 1:59 PM

JAYSINBAKO

MEMBER
5 POSTS

Thank you a ton. I have done plenty of mechanic work but this is my first dive into the A/C system. I appreciate the knowledge and quick response.

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Wednesday, April 26th, 2017 AT 2:03 PM

CARADIODOC

MECHANIC
33,871 POSTS

You are welcome. I have a lot of people fooled with my "brilliance".

I will be out of town over the weekend at an old car show swap meet, but keep me informed of your progress.

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Wednesday, April 26th, 2017 AT 3:52 PM

JAYSINBAKO

MEMBER
5 POSTS

Final follow up. I've swapped everything over including accumulator and new compressor. Had it vacuumed and filled. Still didn't kick on. A little more research led me to the high pressure switch. That seemed to be the final piece to the puzzle which is a relief considering we can hit upwards of 110° during the summer here.

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Friday, May 5th, 2017 AT 2:18 PM

CARADIODOC