<VV> gas in the oil is probably a leaking fuel pump

[J R Read_HML]

You can also load up the crankcase with gas if you are virtually always 
running on the chokes.  Lots of short trips and no lower shrouds, as an 
example.

Attachments (if any) are scanned with anti-virus software.

Later, JR
----- Original Message ----- 
From: "N. Joseph Potts" <pottsf@msn.com>
To: <kenfran@comcast.net>; <virtualvairs@corvair.org>
Sent: Wednesday, January 26, 2005 7:28 AM
Subject: RE: <VV> gas in the oil is probably a leaking fuel pump


> Fuel gets into a Corvair's crankcase through leaking float valves in the
> carburetors, too, ESPECIALLY when the vehicle has an electric pump that 
> can
> run when the engine is not running. I've seen this with my own eyes, not
> only with the electric pump, but with a mechanical pump on a 140hp engine
> (four float valves to leak).
>
> Joe Potts
> Miami, Florida USA
> 1966 Corsa coupe 140hp 4-speed with A/C
>
> -----Original Message-----
> From: virtualvairs-admin@corvair.org
> [mailto:virtualvairs-admin@corvair.org]On Behalf Of kenfran@comcast.net
> Sent: Wednesday, January 26, 2005 4:10 AM
> To: virtualvairs@corvair.org
> Subject: <VV> gas in the oil is probably a leaking fuel pump
>
> I had the same thing happen to my 1987 Dodge Caravan. The mechanical fuel
> pumps are diaphragm type pumps, and the diaphragm is moved up and down by
> something like a lifter that works off the end of the cam. If the 
> diaphragm
> breaks (and remember that it is just a piece of neoprene that is flexing,
> pushing the fuel in and out of the pump, at the same speed as the engine
> RPMs, for thousands of miles) the fuel is obviously gonna squirt past into
> the engine case. Your oil is not going to lubricate very well when thinned
> by gas. (Might clean out some of those blocked oil galleries, though 
> <grin>)
> This is one reason for using electric fuel pumps. Also, if you change over
> to an electric pump, it is a reason NOT to use the original fuel line
> through the mechanical pump, even though the valves on the mechanical pump
> will still allow it to work. But if the diaphragm leaks, you are still 
> gonna
> get gas into the oil. My Corsa came without a fuel pump or master 
> cylinder,
> and one of the first things I'm gonna do is put on an electric pump.
>
> Ken Franson
> CORSA & Arkansas Corvair Club member
> 1965 Corsa 140
> 1966 Monza 110 auto 4-door
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