1994 Buick Regal 3.8L A/C Compressor Replacement

RAZORGRAPHX

MEMBER
1994 BUICK REGAL
6 CYL
FWD
AUTOMATIC
100,000 MILES

I am trying to replace an A/C compressor on a 1994 Buick Regal 3.8L. Got the old compressor off and was going to start installing the new (remanufactured) one, however, on the back side of the old compressor there was an electrical connector and on the new one there is not (there is a place in the corresponding spot on the new compressor, but it is just a plug sealed in with a snap ring - the connector on the old one is also sealed in with a snap ring). How do I get the connector out of the old one and into the new one. Don't want to just pull on it, for fear of breaking it! I have removed the snap ring, but the connector seems to be really stuck in there, just don't want to pull and break it if I'm not supposed to! Also, is there anything else I need to do after this before I put the new compressor in? I know in a couple of manuals, I've read something about adding oil, but where? PLEASE HELP!

3 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

The O-ring is just stuck in the hole. Carefully work it back and forth and you should be able to free it up. If it breaks, just buy a new switch.

I have to warn you though. You may live to regret using a reman compressor. The failure rate on those is terrible. New is the only reliable way to go. You also need to find the cause of the first failure so it doesn't happen again.

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Wednesday, October 13th, 2010 AT 9:19 PM

RAZORGRAPHX

MEMBER
3 POSTS

Thank you for the info and advice! Any info on the oil question. Is there some oil I should be adding to the compressor?

FYI.(And I apologize if the terminology is wrong, but I really am a car repair amateur), but it seems the failure of the first one was more just a mechanical failure of one of the discs(?) On the clutch of the first one.

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Wednesday, October 13th, 2010 AT 9:26 PM

WRENCHTECH

MECHANIC
20,761 POSTS

Yes, you definitely need to add oil to the compressor. First determine if there is any in it already. From empty I would add 4 to 5 ounces of Pag oil to the compressor. Add another 2 ounces for each of any other components replaced like the accumulator or the condenser. Add that oil to the accumulator.

You really need to take a hard look at this system when first charged. I really think there is a pressure problem that took the first one out. They don't just fail on their own. Something causes it and it takes experience to recognize that. This is why A/C work is not really a DIY job. It requires a lot of experience for a reliable repair. Mistakes now will result in a lot more expense than you started with.

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Wednesday, October 13th, 2010 AT 9:34 PM