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Farmall & IHC Tractors Discussion Forum
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super C gas in oil?

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skippy

05-09-2005 16:20:25




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I have a 1952 super C. I am getting a smokey mist out of the oil breather on top of the engine. Yesterday I drained about a pint of engine oil into a mason jar and the oil has the color of a cup of coffee with cream in it and it smells like gasoline. Any ideas? My neighbor thinks that the carb float is sticking. Thanks in advance.




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captaink

05-10-2005 08:12:12




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 Re: super C gas in oil? in reply to skippy, 05-09-2005 16:20:25  
Is the carburetor dripping when the motor is shut off? If not, then I highly doubt that it is a carburetor problem unless the mixture screws are really out of adjustment. The reason is that as has been previously said, it has an updraft carburetor which would generally prevent gas as a liquid getting into the cylinders.

Now, if the engine is running too rich (lots of black smoke from the exhaust), or has very poor compression (which is indicated by the smokey mist coming out of the breather) all the fuel may not be getting burned up and pushed by the rings into the crankcase. Usually if an engine is run long enough and warmed up good the gas will evaporate out and you won’t notice it in the oil, but if the engine is run short periods of time, it will tend to collect in the oil. Others are correct about changing the oil, since gasoline (especially ethanol blends) has a tendency to remove oil from the places it needs to be. Not good.

After you change the oil run that engine for an hour or so and get it warmed up, check to see if you still are getting gas in the oil. If not, then it’s pretty likely coming past the rings either due to starting and stopping the engine before it is warmed up, poor compression, or too rich a setting on the mixture screws.

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Peabody

05-10-2005 05:45:48




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 Re: super C gas in oil? in reply to skippy, 05-09-2005 16:20:25  
I can't imagine this being a carbuerator problem, since it is an updraft, and there's no way gas can leak from the carb to the crankcase. From the discription of the smoke, sounds like you've got blow by from bad rings. The gas could be seeping past the rings on compression stroke, contaminating the oil. Leave the carb alone.
But it is always a good idea to turn the fuel off at the tank after use. Those floats are notorious for getting stuck.

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old

05-09-2005 19:24:48




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 Re: super C gas in oil? in reply to skippy, 05-09-2005 16:20:25  
Well to start with do you shut off the gas when you park it?? If you don't thats part of the problem. Also yes you may need to rebuild the carb. DON"T run it till you change the oil unless you want it to blow the engine. Also turn off the gas when you park it, these old tractors do leak gas in the carb a little as they get older.



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kjm

05-09-2005 19:57:27




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 Re: super C gas in oil? in reply to old, 05-09-2005 19:24:48  
Skippy, I had a 460U do this 2 weeks ago the needle valve sticks and drains the gas into the moter. Shut off the gas and rebuild the carb. An in line gas filter helps keep the dirt out.



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