Front seal

Cecil/WV

Cecil/WV

Well-known member
Will the new 1 piece front crank seal that Speedway sells seal on the original sleeve with the spiral groove? They say no modifications needed, but also say the surface must be smooth. Thanks.
 
Yes it will just fine. I don't understand why people use them though. The front rope seals rarely leak, make pulling the pan much easier, and will not eventually groove the crank sealing surface. It's the rear that tends to leak eventually, not so much the front. Stick with the rope seal, JMHO
 
I agree with Russ on the rope seal. One other point. I find that the original rope seals can be satisfactorily re-conditioned & re-used if they haven't been physically damaged. Just let them soak ovenight in gasoline. Rinse. Dry. Then let them soak again overnight in motor oil before re-installing. This treatment sorta "fluffs" them back up like new again. They seal perfectly.

Jack E/NJ
 
Cecil/WV said:
Thanks. I am on the fence about using something new that I have no assurance on.
Click to expand...

Hi Cecil, have used both setups, the "rope" and the newer "neoprene", and neither has had any issues. Both are excellent.

Also much easier to install the "neoprene" 1 piece during ***'y??

Just finished a 292" Merc stroker (see the photo below) with the "neoprene" and after approx 600/700 miles it's "dry as a bone", not a single drop of oil anywhere!

(Add) Would be nice for some vendor to make the rear main seal with the same "neoprene" material!

Thanks, Gary in N.Y.

P.S. Here's a shot below of the "neoprene" seal in place during the final ***'y!
 

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GOSFAST wrote:>>>Would be nice for some vendor to make the rear main seal with the same "neoprene" material!>>>

Neoprene rings are made in a variety of sizes for many different applications such as for full flow oil-filter gaskets. Probably could find one already available from a neoprene gasket mfr that would fit if you could specify dimensions needed. Though I have a labyrinthe main seal, I did use a section of a neoprene oil-filter ring (I think it's from a Mazda oil filter) as a seal between the pan and the rear main cap. I find that the traditional flat seal strips often get misaligned or twisted in the curved pan slot over time and start to leak. The neoprene section is inherently curved and doesn't do this.

Jack E/NJ
 
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