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Why would oil come out of the dipstick at high rpm on a 74 Pontiac 400.?
Wiki User
∙ 14y ago
This is kind of a strange one and something you don't see often. The only thing I can suggest you check is the PCV valve. It sounds a little strange, but I had a Pontiac 400 that would do this. The previous owner had plugged off the PCV valve in the valley pan. Crankcase pressure builds up and can actually force oil and blow by through the dipstick. The PCV valve pulls that pressure out of the crankcase and keeps this from happening. That's the only thing I can suggest you check. If it's not that....your guess is as good as mine.
Wiki User
∙ 14y ago
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