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Dipstick oddness (blow-by?) 200 1988

If the new o-ring solved the problem and you recently cleaned the flame trap, and there are no other oil leaks, then there's probably no concern about crankcase ventilation.

By the way, the oil cap test doesn't work with the plastic caps. They're too light and will skitter around no matter what.

If after replacing the O-ring you still have the problem or other oil leaks develop, you need to take apart your flame trap and oil breather to really check it good. It's possible that even though the flame trap was cleaned, some of the associated vacuum lines, or the oil separator box, are obstructed.






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