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GM ACDELCO V6 compressor case oring

mektek on Tue September 09, 2008 3:29 AM User is offline

Year: 99
Make: chev
Model: lumina
Engine Size: 3.8
Refrigerant Type: 134

I found a leak in between the case halves. There's a o ring that seals them, but neither autozone nor the GM dealer sells it.
Anybody know where to get parts for this compressor?


Chick on Tue September 09, 2008 6:32 AM User is offlineView users profile

Send an e-mail to, board sponsor and they can probably help you out. They can also help you with a new or reman compressor should you find the job a little to much for you. If you're gonna change the body O ring, the front shaft seal should be done at the same time.. Hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

NickD on Tue September 09, 2008 7:09 AM User is offline

Usually the problem is not the O'ring, but the aluminum around it is all corroded with pits in it, a new O'ring will not solve that problem. Aluminum is not found in nature and to nature it wants to return. There are however alloys that will last forever, such as found in throwaway soda cans, but they cost a few cents extra per pound. But if a can a pop poisons somebody, cost is justified by a huge major class action lawsuit, don't have to do that with a compressor.

That reminds me, have to go to my building supplier today and buy a larger trash can.

GM Tech on Tue September 09, 2008 5:15 PM User is offline

The problem is the corrosion that crawls in under the body o-rings- I repair two or three a week- by breaking them apart and sanding down the sealing surfaces with emory cloth- then replacing the o-rings and the shaft seal-- never had a comeback yet-- so I know it works- once you do a few, you soon understand what is going on...Since the pumps aren't painted, or clear coated- the corrosion takes place.....

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

NickD on Wed September 10, 2008 9:13 AM User is offline

Do you do anything to retard further corrosion? But you do clean it up first, if it can be cleaned up without removing too much metal. I use to paint my R4's to prevent a corrosion problem, haven't done anything with my V5 yet, and not sure what to do with it as I can't even reach it. Just let it rot?

Course, there are two sides of this fence, have to admit if everybody did things right, would have never had an income, but on the other hand, if it's my own stuff, that is money or work out of my pocket.

Often questioned why that loneliness Maytag guy in town was even there if he wasn't earning a living. Really a dumb commercial.

mektek on Thu September 11, 2008 3:42 AM User is offline

I Expected that the sealing surfaces would be corroded and need to be cleaned up. It's usually good practice to replace the oring rather than reuse it, but I can't find anyone that sells it then I'll have to try something else. If I need to take desparate measures, I'll set the old oring in a bed of epoxy.

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