<VV> gas in oil

[Frank DuVal]

The check valves in the fuel pump (mechanical or electric) keep the gas 
flowing toward the engine. They stop the flow back towards the fuel tank.

So, if the fuel tank is above the engine, the check valves will allow 
the flow toward the engine, not stop it.

So, your fuel pump is OK, as far as the check valves.

But, if the diaphram is cracked, then fuel will flow into the crankcase. 
However, it is flowing all the time the engine is running, not just from 
gravity. I would pull the pump up enough to see if gas is flowing out 
the bottom and into the crankscase.

If the oil stays free of gasoline in normal conditions, I suspect the 
floats and needle/seats of not sealing correctly. Maybe the hill angle 
jambed the float so it would not seal, but seals on flat ground in 
normal operation?

Frank DuVal

Michael Kovacs wrote:

> Car sat for about 4 weeks on the ramp to the garage, nose up hill. Today I started some routine maint on it and when It it started, it it pumped oil/gas out the breather and the usual places. The dip stick says I have about 6 quarts of  "oil".
>
> I know it gravity flowed from a full fuel tank into the fuel pump and on its merry way into the oil pan. What I want to know should I change the fuel pump?  Did this indicate that a part of the fuel pump failed and allowed the fuel from the tank to gravity through it and flow into the engine? Should the fuel pump have stopped the gravity fuel flow past it? First time this kind of problem for me in 40+ years of Corvair ownership.
>
> I raised the back of the car and no more fuel flow to the pump, and will drain engine / filter tomorrow.
>
> Should I replace the fuel pump??????????
> MIKE KOVACS 
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