The Mighty 258 > General Service and Diagnosis

Valve Stem Seal Options, Opinions Requested...

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djm3452004:
Good Evening, All --

Was hoping for a little input on replacing my 1980 258 valve stem seals.  I have a pair of options for the stem seal materials.

See the attached photo, please.  The seal on the far left is one of the original "unbrella" seals, and is a hard plastic.  The Felpro replacement seal in the middle is also a hard plastic, P/N SS70530.  The option on the right is a soft silicone material with a spring from Enginetech, P/N S2886-20.

I am wondering which type of seal to go with, the hard plastic Felpro, or the soft silicone Enginetech. 

I've searched a little online, but it's an "opinions are like a-------" situation, many different types are endorsed.

https://www.enginebuildermag.com/1998/07/valve-stem-seals-materials-and-designs/


Thank you in advance for the input --

David

Taylor:
This is what I found on the Jeep forums.
https://www.jeepforum.com/threads/umbrella-type-valve-seals.1222052/

mudkicker715:
I can say I had  no problems with felpro.

djm3452004:

--- Quote from: mudkicker715 on March 20, 2022, 08:58:21 PM ---I can say I had  no problems with felpro.

--- End quote ---


Ok, thank you for the feedback!  Seems the best course of action here is to go for the factory-style seals.

David

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