Rear main seal.

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Sep 6, 2007 | 01:26 PM

Ajaxxx

Thread Starter

Cruising

Joined: Sep 2006

Posts: 13

Likes: 0

From: North Babylon New York

Rear main seal.

I'm going to attempt to replace my rear main seal on my 81. I checked other posts on this subject and it looks straight forward. My question is what is the best type of seal to use? One piece or two? I was looking at Fel-Pro Performance FPP2912 from summit for $22. bucks. It's a two piece. All suggestions are welcome. Thanks.

Sep 6, 2007 | 01:30 PM

Durango_Boy

Team Owner

Joined: Aug 2006

Posts: 24,125

Likes: 15

From: Columbia Missouri

I think you have to have a different style block to have a one piece rear main seal.

Sep 6, 2007 | 01:39 PM

BerniesVette

Melting Slicks

Joined: Oct 2004

Posts: 2,662

Likes: 8

From: Knoxville Tennessee

If your engine has a one piece rear main seal, that is what you have to use. My 79 had a two piece seal so that is what I had to use to replace it.
Bernie

Sep 6, 2007 | 01:42 PM

Ajaxxx

Thread Starter

Cruising

Joined: Sep 2006

Posts: 13

Likes: 0

From: North Babylon New York

I was looking at summit again and I do need the two piece. Thanks for your replies.

Sep 6, 2007 | 02:10 PM

Paul L

Team Owner

Joined: Aug 1999

Posts: 30,995

Likes: 99

From: Ontario

You're fortunate. To replace the one-piece seal you need to drop the transmission.

Sep 6, 2007 | 02:37 PM

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

For your pan gasket, be sure to use the Fel-Pro 1 piece. They're great.

Sep 6, 2007 | 02:48 PM

Durango_Boy

Team Owner

Joined: Aug 2006

Posts: 24,125

Likes: 15

From: Columbia Missouri

Oh, and don't buy a Fram oil filter. Wix is a very common and very good oil filter.

Sep 6, 2007 | 03:36 PM

desi

Melting Slicks

Joined: Sep 2002

Posts: 2,783

Likes: 2

From: Engineers do it better.

Quote:

Originally Posted by Jud Chapin

For your pan gasket, be sure to use the Fel-Pro 1 piece. They're great.

You might need the thin seal. I think they changed after 74... Be sure to double check.

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Sep 6, 2007 | 03:39 PM

Edzred72

Le Mans Master

Joined: Oct 2001

Posts: 5,943

Likes: 3

From: Wildwood IL

Quote:

Originally Posted by Durango_boy

Oh, and don't buy a Fram oil filter. Wix is a very common and very good oil filter.

CarQuest brand filters are made by Wix

Eddie

Sep 6, 2007 | 06:26 PM

#10

NHRalph

Racer

Joined: Mar 2007

Posts: 306

Likes: 0

From: New Hampshire

I believe one piece seals were from 1986 on, earlier 350's had 2 piece.
I usually get my filters at NAPA, they seem to filter better then FRAM, although you can get FRAM's anywhere.

Sep 7, 2007 | 01:28 AM

#11

jackson

Le Mans Master

Joined: Sep 2001

Posts: 7,739

Likes: 630

From: Unreconstructed, South Carolina

You don't need "race" seals/gaskets for your 81 ... they won't seal any better but will cost alot more. Why not just go to local parts store?

These are correct for an 81 sbc:

Rear Main Seal = Felpro BS40013 ( if your crank has a groove worn in it by seal substitute w/ offset lip rms BS11829-1 )
One Piece Oil Pan Gasket = Felpro OS34510T ( it's a nice 1-piece rubber gasket to retrofit '75 thru '85 but it's not a race gasket )