Rear main seal

[tkoboat]

I am replacing the rear seal on my 340. What’s the best seal to use? Any other advise is welcomed.

 

[Rocket]

Superperformance has a good seal.

Superformance Products - Performance Automotive Gaskets and Seals

www.superformanceproducts.com

 

[cudamark]

I've had no problems with the FelPro ones in the overhaul kit.

 

[Bodyperson]

Slightly offset the parting halves of the seal to the main cap's mating to the block. A tiny dot of silicone where the seals meet.

 

[RustyRatRod]

I've never in my life offset the seal halves. I do always put a dab of RTV on the seal ends and then assemble.

 

[Newbomb Turk]

I've never in my life offset the seal halves. I do always put a dab of RTV on the seal ends and then assemble.

Yup

 

[CRUZE 418]

I don't think that you can offset the small block seal, not a Felpro anyway. Unless you cut the sides off. I just finished this on mine. The main cap does need a slight smear of sealer across it. I do mean slightly.

 

[Bodyperson]

I don't think that you can offset the small block seal, not a Felpro anyway. Unless you cut the sides off. I just finished this on mine. The main cap does need a slight smear of sealer across it. I do mean slightly.

You guys a probably right about the offset. Been a while for me with a few chevys in between.

 

[cudamark]

You could with the old rope seal. Not so easy with the neoprene ones.

 

[RustyRatRod]

I don't think that you can offset the small block seal, not a Felpro anyway. Unless you cut the sides off. I just finished this on mine. The main cap does need a slight smear of sealer across it. I do mean slightly.

I do that as well, a real light skim all the way out to the parting lines.