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V5 Compressor

JLHAWKINS on Wed June 17, 2009 11:06 PM User is offline

Year: 1997
Make: Oldsmobile
Model: Cutlass Supreme
Engine Size: 3.1
Refrigerant Type: 134A
Ambient Temp: 90
Pressure Low: 27
Pressure High: 240
Country of Origin: United States

I make a post about this vehicle a short time ago. The vehicle has been in the family since new and after 12 years with the system unopened and no refrigerant added, this summer I was greeted with little cooling resulting from a leak. My question to the forum was where was the most likely place on this vehicle for a leak to develop. The answer was the compressor body o-rings and the compressor shaft seal. As recommended I "dyed" the system and there (just like they stated) was the leak at the compressor body O-ring nearest the clutch.. It does not appear the shaft seal is leaking.

I have several questions concerning this compressor and its repair.

1. What is the likelihood of a successful repair of the leaking O-ring? I remember a recent post by one of the Senior Members where he stated he repaired them quite frequently and utilized a fine steel wool to remove any corrosion from the O-ring grooves. It seems that corrosion in the groove causes the O-ring to lose its sealing ability and leak.
2. What is the level of difficulty in replacing the O-rings/gaskets? Looking at the exploded view found on this website, it looks pretty straight forward. I have all the tools necessary to disassemble the compressor.
3. I noticed AMA sells two gasket/O-ring kits for the V-5. The more expensive kit utilizes an metal gasket. It there an advantage to using the metal gasket particularly in my case? Considering the work involved, the $10 or so more for the metal gasket kit is insignificant.
4. If I change the O-rings, I intend to also change the shaft seal even though it does not appear to be leaking. If I have the compressor disassembled, will I still need the seal removal tool and the shaft protector? Again from the exploded view, it would appear I would not need them but that assumption may be incorrect. I do not have these tools and would need to order them from AMA along with the other parts required.

I would appreciate the Forum's input on these questions.

Thanks!!!

Chick on Thu June 18, 2009 6:59 AM User is offlineView users profile

You will need the tools to change the shaft seal, that said, the body O rings (two) are not difficult. We just posted a link to what to expect when you remove the two halves. The O rings are rubber, not sure what you mean about metal? Anyway, it's not hard, care must be taken with the shaft seal, you don't want to nick it.. Hope this helps..
PS. there is also a thread on changing GM shaft seals in the tips and info section of the forum....

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Chick
Email: Chick

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Freedoms just another word for nothing left to lose

GM Tech on Thu June 18, 2009 8:24 AM User is offline

No metal gaskets are used on the V-5- The shaft seal is leaking- guaranteed- never seen an OEM that wasn't after 10 years (single lip)- when you pull the clutch drive off, you will see the leaky shaft seal and you will damage the old seal anyway when you tear the compressor apart- so replace it last.

Here is a recent photo of a leaky V-5 shaft seal from a '99 Cavalier- seal is changed on car without removing compressor if you are not doing belly o-rings..





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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......

Edited: Thu June 18, 2009 at 9:34 AM by GM Tech

JLHAWKINS on Thu June 18, 2009 1:28 PM User is offline

Thanks Chick and GM Tech for your input, photos and video. They will be a great help.

Concerning the question about the metal gasket, AMA lists two Gasket Kits for the V5, the first is Item No.21-24610, "Gasket Kit GM V5" ($6.79). The second is Item No. 21-24762 "V5 Metal Gasket Kit R134A" ($17.27). Could that mean that the latter is for use with R134A and maybe the first was for use with R12 as I understand some of these type compressors were used on earlier model before OEM changeover to R134A? Could someone enlighten me on the two different kits?

Also, AMA lists two shaft seal kits for the V5. One is a large shaft and states the top of the can measures 18.25 mm. The second states the top of the can measures 15 mm. What do they mean by "top of can"? How can I determine which seal kit I need to order? The vehicle is a 97 Olds Cutlass Supreme with the 3.1L engine and Dual Climate Control (if that matters).

Your input on the two questions will be appreciated.

Thanks in advance!!

GM Tech on Thu June 18, 2009 3:19 PM User is offline

The only metal gasket in a V-5 is internal- seals the rear head to the valve plate- so it does not effect or have anything to do with compressor leaking or sealing- all V-5 shaft seals from 1984 to 2001 MY are the same -and the same seal is used in R-4s and in h-6 series of compressors up to 2002- when they all (except R-4) went to overmolded seals- complete design change. Sorry, I do not use parts numbers- all my seals are in a big plastic bag- with no numbers on them.....AMA will have to define specific part numbers for you.

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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......

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