Fuel in crankcase

Asked by Mar 14, 2019 at 01:42 AM about the 1967 Chevrolet Nova

Question type: Maintenance & Repair

Can intake manifold
gaskets cause feul in
crankcase?

1 Answer

64,325

Your car came with a factory mechanical fuel pump, a leaking or ruptured diaphragm could leak fuel into the crankcase. The carb would have to be leaking like crazy to do this. You can check the float/needle, if fuel fills float bowl and flows into carb then into intake, it can sit in combustion chamber and leak past rings. But that's a long shot, much more likely the fuel pump.

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