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Allis Chalmers Discussion Forum

AC G burns all oil...

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04-09-2008 19:52:33

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I have an AC G that doesn"t like engine oil. It will burn it all out until there is less than 2qts in the pan. What am I up against? Any help would be appreciated -> Spring will eventually come and I really need this thing running!


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Dick L

04-10-2008 07:02:45

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 Re: AC G burns all oil... in reply to papadeavery, 04-09-2008 19:52:33  
That is common with that type of cooling system. What happens is they over heat and the rings loose there tension. If it is not allowed to run out or oil to where you get bearing damage you can drop the pan, remove the head, remove the rod bearing caps one at a time, push the piston up above the rings, put on new rings, put the piston back down in the cylinder and replace the rod cap.

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I find this the easiest way to install the rings on a rebuild as well.(On this engine)

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04-11-2008 19:26:12

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 Re: AC G burns all oil... in reply to Dick L, 04-10-2008 07:02:45  
howd you get that thing to look so clean???

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Dick L

04-10-2008 07:09:12

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 It Could Be in reply to Dick L, 04-10-2008 07:02:45  
It could be wore out as well. A person would have to know when the oil burning started. Hard to tell for sure of the total problem without a history.

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David Maddux

04-10-2008 05:25:34

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 Re: AC G burns all oil... in reply to papadeavery, 04-09-2008 19:52:33  
I think that Steve is thinking that it has overhead valves. However, I would have the head checked for cracks and make sure it is flat.

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Steve in NJ

04-10-2008 03:54:03

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 Re: AC G burns all oil... in reply to papadeavery, 04-09-2008 19:52:33  
Sounds to me like the engine is tired out and has quite a bit of clearances in it. Time for a rebuild if its going through that much oil. Engine kits are available for the little Continental N62 engine. Also, if you decide to do a rebuild, don't forget to have the cylinder head done also. Try Tony's Tractors for an engine kit. They can help you out...

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Jerry Coulter

04-10-2008 05:15:29

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 Re: AC G burns all oil... in reply to Steve in NJ, 04-10-2008 03:54:03  
What do you do to the cylinder head on a G?

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Steve in NJ

04-11-2008 03:26:45

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 Re: AC G burns all oil... in reply to Jerry Coulter, 04-10-2008 05:15:29  
Make sure she's flat. Run a straight end over it. Heads warp over time with heat, sure doesn't hurt to check em' out. Makes for a perfect head gasket seal...

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04-10-2008 08:09:10

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 Re: AC G burns all oil... in reply to Jerry Coulter, 04-10-2008 05:15:29  
? Check for flatness, and for cracks?


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