Lower O-ring for PCV valve size? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 06-16-2003, 09:57 PM   #1
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Default Lower O-ring for PCV valve size?

I just bought a Chilton manual for 88-99 year bonnevilles and it says I am supposed to have a lower o ring in my 93 bonneville but I dont so does anyone know what size it is or maybe a part number?

I talked to a couple autoparts stores and they looked at me like I was stupid. The pcv valve body setup is different than the common ones. I couldn't find any info on what type to buy and was thinking that my slight idle problem could be caused by gases escaping where they shouldnt.
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Old 06-17-2003, 12:16 AM   #2
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I'm not sure if you can buy just the ring, but at gmpartsidirect.com they sell a PCV kit that includes the rings...or so thats how I understand it.

My lower ring was jet black so make sure you didn't overlook it before you buy one.
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Old 06-17-2003, 02:13 AM   #3
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Is it really thin? I looked, had a rag and needle nose plyers and everything down in it.

I was concerned because there is always residue, it looks like left over gas, on the pcv valve and upper o ring and spring. So I figured something might be escaping thats not supposed to.

Do you have the dimensions of the o-ring? Or even better a picture?

Thanks guy
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Old 07-02-2003, 12:05 AM   #4
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I think there is no O ring. I dont have one. I dont see how a O ring would work with this type of pvc valve.
I saw that in my Chilton book to.
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Old 07-02-2003, 12:12 AM   #5
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There'* an O-ring there. I would go over to the dealer and have them look it up on their computer. Maybe they could even sell you one (at a slightly elevated price).
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Old 07-02-2003, 02:28 AM   #6
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The chilton'* book does have info about a upper and lower o ring. I went down to autozone a couple weeks back and just got a set of black o rings, various sizes, slid a tight fitting one over the bottom to the point were it hits the rim. I can't tell any difference. Must not be very important.
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Old 07-02-2003, 05:38 AM   #7
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Make sure you get a round one (had to at least THINK I was helping here).

My last PCV valve came with an O-ring, and I'm damn glad it did. Get'* kind of nasty in there. You only want this sucker breathing one way. The o-ring keeps the wrong way from happening.
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Old 07-02-2003, 02:43 PM   #8
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O rings are round. Rubber washers aren't.

How thick is yours. I would still like to see a picture of someone'* pcv valve with o ring in place so I know I got the right position and size.
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Old 07-02-2003, 04:44 PM   #9
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Well.. I found the bugger..
and I looked for it twice before.
Now I have, peace of mind
Thanks
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Old 07-03-2003, 02:09 AM   #10
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What do you mean you found it? Was it hiding at the bottom of your pcv housing?
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