diesel in oil 4320

larryanderson · Dec 28, 2012

A fellow called with nice 4320 said it gets small amount of diesel fuel in oil.I had it happen on a truck several years ago and it had to do with injection pump .Any input? thanks

Anonymous-0 · Dec 28, 2012

I believe it can get in there through the lift pump.

woodbutcher · Dec 28, 2012

Ditto. I solved the same problem on my 2040 by changing the lift pump.
Butch

tim s · Dec 28, 2012

The lift pump, then the injector pump drive shaft seal, with a possibility of the return fitting clogging a bit creating back pressure to the shaft seal..

Jethro Lilley · Dec 31, 2012

Thanks, guys... My 2510 is getting diesel in the oil. Changed the fuel filter last spring and the plunger on the take-up pump did not work. Had to take off the bleeder and pour fuel in to fill the filter. Bet that's the problem. Adds about a quart of fuel to the crankcase every 10-13 hours, so I change it often.

Tx Jim · Jan 1, 2013

Lift pump can't pump fuel if cam lobe is putting pressure on lift pump operating arm. Engine must be rotated a little to get cam lobe away from pump arm so pump can pump fuel.

Jethro Lilley · Jan 1, 2013

Nah... the plunger is broken. No resistance to it at all. Thanks.

diesel in oil 4320

larryanderson

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Anonymous-0

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woodbutcher

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tim s

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Jethro Lilley

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Tx Jim

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Jethro Lilley

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