TOPHAT VALVE STEM SEALS

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TOPHAT VALVE STEM SEALS

Postby wilkyflex » Sun Feb 24, 2019 10:32 pm

4 OF THE 12 valve stem seals slipped and were riding up the stems, thus causing oil burning and blue smoke.

Does anyone know where I can get the tophat style seals that will fit the old style 1992 cummins head?

I know I can buy the top hat seals that fit the new style head and 94-98 cummins, but they say it requires machining to get the seals to fit.

Does anyone know exactly what machining is required to make the seals fit?

Thanks
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Re: TOPHAT VALVE STEM SEALS

Postby spencerdiesel » Mon Feb 25, 2019 6:24 pm

Did some brief searching and it seems like the machining is required to run the top hat style. The good part is this particular "machining" seems to be a simple single cut per int/ exh. I read multiple forum posts stating it cost from $50 to $100 to have the machine work done.
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