water in oil question

Anonymous-0 · Oct 27, 2012

I have a model M tractor that was always getting water in the oil and was certain that it was the head gasket as there was no air bubbles in the radiator, so I pulled the head and had valves ground, head planed .011" and magnafluxed. Put everything back together and still the same problem. Not sure what to do next. Could this be a cracked block or maybe something simple like a bad water pump? Any advice would be appreciated.

Janicholson · Oct 27, 2012

With a good head, it must be either a cracked Cylinder bore allowing coolant to get between the sleeve and the bore, then dripping into the pan, or a rusted through core plug behind the front cover. There is no oil related connection to the water pump. There is no probable connection between the internal oil passage to the head and coolant.
Pull the oil pan and use a good light to see where it is dripping. from the base of a sleeve is worst case. because it could require a repair involving boring out the old block bore for a thick repair sleeve, then boring that out to fit a replacement sleeve. (common enough repair)

From the timing gear area is least painful, but requires removal of the front of the tractor to replace. Jim

mattwillson · Oct 28, 2012

I had a water in oil problem with my M, it turned out to be from the exhaust pipe out of the manifold needed replacing.

Brian in MN · Nov 4, 2012

(quoted from post at 08:08:37 10/28/12) I had a water in oil problem with my M, it turned out to be from the exhaust pipe out of the manifold needed replacing.

Matt, can you explain what needed to be replaced? My 400 is still getting water in the oil after a head resurfacing and new head gasket. Trying to figure out where it's coming from.

Thanks

Brian

rustyfarmall · Nov 4, 2012

(quoted from post at 05:08:37 10/28/12) I had a water in oil problem with my M, it turned out to be from the exhaust pipe out of the manifold needed replacing.

In that situation, it would be rain water getting into the manifold, and entering a cylinder through an open exhaust valve, and then that rain water would need to somehow find its way down past the piston rings where it would finally accumulate in the oil pan. Not saying it couldn't happen, but a several unprobable situations would need to line up exactly for that to happen.

Tom Fleming · Nov 4, 2012

Ok, let's clear something up, which is my first question. Is it clear water in the oil or antifreeze. If you have antifreeze in the rad, but water in the oil, different issue than if you have coolant in the oil.

Brian in MN · Nov 4, 2012

Is it clear water in the oil or antifreeze. If you have antifreeze in the rad, but water in the oil, different issue than if you have coolant in the oil.

How do you tell the difference? My oil looks like milk. After the head gasket change, it ran for 3 or 4 hours and still had nice clean oil. It sat for a few days, one of which it rained, and then ran for about an hour before the oil turned to milk.

Tom Fleming · Nov 5, 2012

Brian, easiest way is to let it set for a few days, then crack the drain plug open for a second or two. Since water or coolant is heavier than oil, it will be settled to the bottom. IF what comes out is clear, you have either condensation or water getting in somewhere. IF it is coolant, you have a crack somewhere or a bad head gasket.

Brian in MN · Nov 5, 2012

Thanks, Tom. Next time I'm home I'll give that a try.

water in oil question

Anonymous-0

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Janicholson

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mattwillson

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Brian in MN

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rustyfarmall

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Tom Fleming

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Brian in MN

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Tom Fleming

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Brian in MN

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