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bigbadsquare

1500 cylinder head valve stem oil seal leaking

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bigbadsquare    89

Well lapped and trial fitted my first inlet valve to my head. Filled the port with penetration fluid to see if it would leak. No fluid leaked from the valve but was losing fluid from the valve stem oil seal. Brand new valves , seals, springs etc... any suggestions????post-11579-0-93210100-1495891513_thumb.jpg

post-11579-0-08856100-1495891552_thumb.jpg

post-11579-0-78736300-1495891612_thumb.jpg

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colr6    1,271

Wouldn't worry to much about that, the oil in the engine is a lot thicker than that. Plus it won't be submerged in oil only lightly fed from the rockers.

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BeigeAl    10

Nothing to worry about there - this is a function of valve stems needing to be fed with oil and having sufficient clearance - if the clearance was too tight the oil wouldn't get between the valve and valve guide. That's why you shouldn't use oil seals that stop oil getting down the guide when using cast iron (or "as-cast" guides). With bronze guides because they are self-lubricating they can be sealed but bronze guides can run much tighter clearances so the need for a seal is is less!

 

Gas won't come out of the valve stem if that's what you're thinking as the valves will be shutting the valve stem off from doing that! 

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