Coolant in oil

[Michaelr0953]

Picked up a 1941 Allis chambers b it slowly get coolent in the oil, what the most command problem, and the first place to look.
Thanks Michael

 

[Michaelr0953]

Common

 

[old]

2 most common cause of that is the head gasket or the sleeve seals. It is a wet sleeve engine by the way. Easy way to figure out if it is a sleeve seal is to pull the oil pan off and then lay a piece of card board under it and see if you get drips on the card board then look up inside and see which sleeve it may be coming from

 

[chaskaduo]

Another common one is the core (some people call them freeze) plugs in the top of the head under the valve train. Rust pinholes form in them.

 

[Butch(OH)]

As they said sleeve seals, head gasket or core plugs in the head. As Old said personally I like to find the issue and fix it rather than guess and it is a very easy process. First thing is to put it in the shop and let it set a day if it is a slow leak, of its a large one,you don't need to let it sit. Then pull the valve cover and look at the 3 core plugs, if you don't see the leaks then remove the pan and look around the sleeves. Head gasket leaks will appear in the oil drains from the head.

 

[Michaelr0953]

Thanks for the reply guys, I will do that.

 

[Mike(NEOhio)]

I found a core plug leaking in my Oliver when I took the valve cover off. A little sludge everywhere except the middle plug, it was clean. Brass plugs so not rusted. I replaced all seven to be sure
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