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Allis Chalmers Discussion Forum
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oil in the WC's exhaust

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Roger A. Morris

02-26-2008 06:07:50




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I just bought a 1937 WC. It runs ok but there is little flecks of oil in the exhaust and when I get done riding around I'm covered in oil spots.
I'm new to the tractor restoring thing and I'm not an expert yet on enigine operations. Would this oil be from bad piston rings or is there something else that would cause this?




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Roger A. Morris

02-27-2008 14:08:52




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
Thanks for the suggestions. I'll try changing the oil and the gas and see if that helps. If that don't work I'll try Old's idea and soak the cylinders in the tranny fluid.



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mlpankey

02-27-2008 14:08:04




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
i would think if its blowing oil it would be fouling plugs reguraly.



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mlpankey

02-27-2008 14:06:22




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
sure its oil and not raw fuel after mixing with a little exhaust carbon its sometimes hard to tell..



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Harry J. Case

02-26-2008 18:13:17




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
Hey Roger You didn't mention smoke from the exhaust, if that engine is so loose that it blowing oil out of the exhaust it should be smoking badly and fowling the plugs but you stated that it runs ok. I would follow the advice of the previous posts, soak the pistons in tranny fluid, change the oil and gas then run it and pull it hard, plowing or whatever to put plenty of pressure on the rings. That should make it or break it. Good luck, Harry Case, Allis, Moline nut

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Gordon in In

02-26-2008 12:45:14




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
It is POSSIBLE that someone put oil and gas mix in the gas tank. If the was engine stuck and recently "broke loose" and/or "worked on" is might have been done to prevent seizing of the pistons/rings in the sleeves. I know of a couple of people that always use "chain saw" gas/oil mix or "richer" oil/gas mix when starting and running old engines that have been stuck or even that have not been run for a few years. If the gas is an unknown, you might want to try some "fresh" gas of known quality. Also, really cheap, low quality, low viscosity oil can really "go through" an engine. You might want to change the oil and be sure to refill the crankcase with a good quality oil of the proper viscosity. (20W-50 might be a good choice if the engine is really "loose".) There is only a slight chance that these situations exist, but it is not much trouble to check, remedy, and verify. You might "get lucky".

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old

02-26-2008 09:41:07




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 Re: oil in the WC's exhaust in reply to Roger A. Morris, 02-26-2008 06:07:50  
Could be the rings and or the valve guides. Either one or both will cause that problem. I'd say its time for a complete engine rebuild. Ya you might try a valve job but doing that would most likely blow the rings out the bottom so its always better to do both and in the long run save your self time and $$. Other thing that could cause it is stuck rings and or carbon in the engine. You might try filling the cylinders with tranny fluid and let it sit a few days then try it again if its from stuck rings or carbon doing that should help

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