Am I missing some thing ? renewing a S6 head and need new valve stem seals My valves measure 0.360" or 23/64th I can't find any this size should i just use the 11/32 ones ?,Or do I have an odd size, RAY

Stock valves have 3/8" stems. Where on the valve did you measure and what measuring device did you use?

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Joshua

If you are reworking a stock head, order valve stem seals by application and not by size.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I measured at the middle of the stem, with my dial indicator, accurate to with in 0.0001" Not sure if it is a stock head just a motor I picked up to swap over, RAY

Measure just below the keeper notches, might be the valve stems are worn.

Richard

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Part of Tyrde-Browne Racing

The stems are parallel all the way down with in 2 thou, are you sure stock valves are 3/8th ? thats huge and the standard caps available seem to be 11/32 which is smaller"? RAY

Stock intake valve: http://info.rockauto.com/SealedPower/V1434.html
Exhaust: http://info.rockauto.com/SealedPower/V4093.html

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Joshua

Same thing if you look in a shop manual, it says 0.372" to 0.373"

Maybe your head has been rebuilt before, and the valve stems were worn and reground to the smaller diameter. You could try 3/8 Fel-pro stock type seals to see if they still fit snugly. If you have stock S/6 springs, order them for the S/6, if you have performance springs,order them for a 1970s dodge 318 V-8. V-8 springs have thicker coils and a slightly smaller I.D. so the V-8 seals have a smaller O.D. for clearence.

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V8?? We don't need no stink'n V8!!

Wow. A whole, entire thread — ten posts and counting — about buying valve stem seals.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I buy "pretty looking" blue colored ones (viton material) from thisebag seller
There are many shapes and types of valve stem seals out there.
DD