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Allis Chalmers Discussion Forum
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Water where the oil should be

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Go ask Allis

05-10-2007 08:57:31




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The engine started making funny noises and then stopped while I was plowing snow this winter. I decided to take it apart and see what I could see. When I drained the oil A LOT of water come out (2 quarts or so) before any oil came out.

How sad should I be?




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steve(ill)

05-10-2007 18:52:31




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 Re: Water where the oil should be in reply to Go ask Allis, 05-10-2007 08:57:31  
i agree with old, the small crackes in the block are not the problem. look under the rocker arms on the head at the freeze plugs first, then take the oil pan off, fill block with water and look around the bottom of the liners. normally they just drip, if you got lots of water, its a freeze plug in the head.



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Go ask Allis

05-11-2007 03:11:00




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 Re: Water where the oil should be in reply to steve(ill), 05-10-2007 18:52:31  
Thanks for your help, I'm new at this.
Please excuse my ignorance, what are freeze plugs?



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steve(ill)

05-11-2007 15:48:12




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 Re: Water where the oil should be in reply to Go ask Allis, 05-11-2007 03:11:00  
when a head or block is cast in sand, it has a core (to make the internal passages). the core is connected to the outside box. after the csting hardens and the sand is removed there are several holes in the head or side of the block. these are machined round and you pound a sheet metal plug into the hole. ones in teh head are about an inch , ones in teh side of the block are about 2 inch. they will rust out over time. punch with a screw driver and pry sideways, if you see a pin hole thru it.

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Go ask Allis

05-15-2007 05:04:50




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 Re: Water where the oil should be in reply to steve(ill), 05-11-2007 15:48:12  
Thanks. I found them and they look OK.

I took the head off and there is a line of rust running down inside one of the cylinders. I am still searching for what made the awful metal on metal schreeching noise.

Do I have to remove the engine block from the tractor to rebuild it?



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old

05-10-2007 09:22:57




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 Re: Water where the oil should be in reply to Go ask Allis, 05-10-2007 08:57:31  
A lot depends on what tractor you have. On some it could be as simple as a blown head gasket on others it could be bad sleeve seals and or a cracked sleeve . Really need to know what tractor you have to be able to help you much if any



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Go ask Allis

05-10-2007 09:45:28




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 Re: Water where the oil should be in reply to old, 05-10-2007 09:22:57  
It is an Allis Chalmers Model B.

When I took the tappet cover off, there was a little antifreeze up there. I took the head off the gasket didn't show any obvious places where it was leaking.

There is a small crack that runs between the cylinders.



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old

05-10-2007 09:52:00




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 Re: Water where the oil should be in reply to Go ask Allis, 05-10-2007 09:45:28  
You may have a soft plug in the head bad, very simple fix, if I rememebr right thres 2 or 3 of them under the rocker arm assembly. You could also have a bad sleeve seal since each sleeve has 2 seals, to find that you would need to drop the oil pan and fill engine with water and watch for drips. I don't think the crack is your problem if its small since the head gasket should seal it. BTDT on one of the Cs same engine as the B and I have had problems with sleeve seals and soft plugs on one of my Cs, I named it major pain because it has always been a pain in the but

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