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Old August 11th, 2024, 07:38 AM
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Default Re: Rubber Rear Main Seal

Quote:
Originally Posted by OlsonsGaskets View Post
Looking at this Ebay listing I would say it is correct for the GMC V6. I can't be 100% sure without holding them in my hand. Also what is not clear to me is if these are new product or if they are old stock. I don't need to reinvent the wheel if this dealer has already got the solution. Will have to do some checking here.

Regarding Felpro BS40048: At some point 5 to 10 years ago they switched from rubber to rope and kept the part number the same. I got burned by that. Now BS40048 is discountinued altogether. So if you're trying to source an old Felpro set through Ebay it's a crap shoot as to whether you'll get a rope set or rubber set. A really old superceded Felpro part number for the original rope seal with cylinder block plugs and wedge shaped side caps was BS12946.

To my knowledge there is no one producing the round rubber cylinder block plugs that was originally provided in these rear main seal kits. I still provide these in my rope rear main seal kits because I've junked out a lot of old sets but my supply is running low. What I need to know is does the plug need to be designed exactly like the originals with the concave divot on one side or could I just produce a slightly thinner plug without the divot? Anyone out there with insight into this?
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It is the correct seal, looks new old stock, I remove my GMC sale and held it up next to it. Exactly the same size so I installed it installed it this morning fit perfectly! It came in a bag and it said 17091 on the bag and I also confirmed with the seller before I purchased it. He confirmed it is the correct Seal and had about 10 of them left

Last edited by 63gmc4x4; August 11th, 2024 at 07:43 AM.
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