89 IROC 350TPI. Just rebuilt last fall. I have a blue puff at start up, after sitting for some time. I have searched all the posts, but . . could valve stem seals wear out in less than a year (no storage - and about 3500 miles since)

I just recently put in "center-bolt wire looms", they come with new bolts so the originals aren't being used.

Could this have something to do with it.

Other than that I haven't done anything to the engine but tune up type stuff.

Thanks for any back-up or put-downs, I'm open to anything.

 

Generally vavle steams seals are to blame. If you didn't seal it right of course it could wear. Try using Mobile 1 syntheic oil too. But I'd check those seals first.

 

seems like valve seals to me.
by the way...does anybody knows a good valve seal set to use? i'm going to do also but i need a part number, soes summit have it?
good luck to all.
fernando

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third gen muscle power is the only thing that can match the power of flight...