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Allis B coolant in oil

M

Mathias NY

Well-known Member
2 years ago I parked my Allis B in the barn and let it sit. Yesterday I decided to get it going again.

I changed the oil. It had some water in it, but that's not surprising because it sat outside before it went into the barn. I checked the coolant level, that was still fine. I added some fresh gas and after fixing a sticky float in the carb, it fired right up.

I let it warm up for about 10 minutes before it over heated. To my surprise the radiator was empty and the crank case was over full. The tractor only has about 10 hours on a new head gasket, but it did look wet around the #1 cylinder. Prior to this I had not noticed any coolant leakage.

Is it common for a head gasket to fail like this or it is more likely something else like a sleeve liner seal?

Thanks for the help!
 
When that new head gasket was put on was it torqued then ran till warm and re-torqued?? If it was not likely to be the head gasket but if it sat a long time could well be a sleeve seal. I would pull the oil pan and set a piece of card board under it and fill the cooling system up and let ti sit over night. If it is a sleeve seal you should then be able to see which one it is
 
Check the freeze plugs in the top of the head under the rocker arm shaft area, they can rust through and do this. If not this, take the pan off and see if you can see it coming down past a liner. May not be the head gasket.
 
I would guess it would be he core plugs under the rocker arms in top of the head. I do wonder the reason it needed a head gasket when it was changed. That could be a clue to what is wrong now.
 
Thanks for the replies. It sounds like the soft plugs in the head are the best place to start. Based upon how quickly the leak occurred, I think I'm looking for a significant failure and the sleeve seals probably wouldn't get this bad that quickly.

Dick - When I bought the tractor, the head was off and the pistons were seized. The tractor had sat outside and the aftermarket muffler had allowed rain water to work into the exhaust.
 
If the core plugs look good you might want to drop the pan and wipe every inch dry and keep it full of water, then watch for a drip. The sleeve O ring seals could have been loosened when unsticking the pistons. Once old hard O rings move a slight bit they can loose there seal.
 
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