Quote:
Originally Posted by Yellow Pig
Looks kind of like the valve seals to me. Now if it is the valve seals I'm I better off going a head and doing the wossner piston kit w/ the better oil rings and be done with it or just reuse the OEM piston and rings?
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You've already got it apart. Wouldn't it suck to put it back together and still burn a crapload of oil? I would go ahead and replace the piston just to improve my chances of avoiding another teardown.
Besides, valve stem seals shouldn't affect your leak-down numbers, so the pressure is either getting by the valves themselves or the rings. The rings on the stock piston are known to be problematic.
I should point out that my previous comment, "especially at 100 hours" was not meant to imply that 100 hours is a lot. If you had said 200 hours, I probably would have said not to bother with the leak-down test, just go ahead and replace the piston if it's coming apart anyway.