How can gas get into the engine oil of a 1975 volkswagon beetle?


Asked by williso Mar 19, 2013 at 05:02 PM about the Volkswagen Beetle

Question type: Maintenance & Repair

asked the question befor on this site about the engine oil going up on the dip stick---yes the oil is thin and it smells
with gas--so now I changed the question---the car starts and runs good but some gas fumes in the inside of car---
who can help---thanks--

3 Answers


I take it that the bug has carbs or just one carb, the problem could be the fuel pump leaking into the crankcase or the carbs themselves leaking fuel down into the manifolds and it finally finds it's way into the crankcase. All this happens after the engine is shut off and sets in what they call a hot soak condition. Hope this helps.


thanks Mark---was wondering if it was the fuel pump or the carb or maybe the piston rings---


If the fuel mixture is rich, gas could get past the piston rings into the engine oil while running. A rich condition can be confirmed by the color of the spark plugs and the smell of the exhaust.

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