Quote:
Originally Posted by Owl3
Could it be a physical leak? Since it's located in the valley maybe the leaking fuel would just end up in the oil returning to the pan.
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Yes.
The internal shaft seal can fail. This causes fuel to dump into the crankcase. If you continue to run it like this it can cause bearing degradation.
This is typically caused from improper pump preload. Usually the pump is bottoming out.