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Farmall & IHC Tractors Discussion Forum
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Oil coming from muffler

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Kyle from Kentu

11-01-2004 21:04:25




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Can anyone explain why there is what appears to be black crankcase oil dripping down from the top of the muffler on my 1953 Super C? I know it burns oil and the rings must be worn but I've never seen anything like this before. It's almost as if someone is pouring black paint onto the outside of the muffler. It's worse when the engine is at low idle for extended periods. Is it simply oil coming from the cylinders all the way through the valves and exhuast manifold to the muffler? If so, is it harmful to the engine? Thanks for any information and advice.

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gusc

11-03-2004 13:38:58




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 Re: Oil coming from muffler in reply to Kyle from Kentucky, 11-01-2004 21:04:25  
Kyle,

You are getting a combination of black fuel smoke from a rich mixture at idle and burned oil. All the remarks about working are correct, this gets rid of the fuel smoke and even some of the oil. A slightly heavier oil might help some.

Blowby flows past the rings into the crankcase and does not go out the exhaust.



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Chuck's Repair

11-02-2004 18:19:41




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 Re: Oil coming from muffler in reply to Kyle from Kentucky, 11-01-2004 21:04:25  
Raise the coolant temperature.If the thermostat won't bring the coolant temperature up to operating temperature alone then you will have to cover the radiator.Shoot for 180 degrees.



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Bob M

11-02-2004 06:33:33




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 Re: Oil coming from muffler in reply to Kyle from Kentucky, 11-01-2004 21:04:25  
Kyle - What you describe is called “slobbering”. Cause and cures are pretty much as Michael describes below. A word of warning however: There’s a risk that adding Rislone, ATF etc in the oil will cause accumulated varnish etc in the engine to dissolve and make the oil consumption/slobbering problem WORSE. So as long as your tractor runs OK (doesn’t foul plugs) and you don’t mind the mess, safest course is to just live with it.

As Micheal suggests working the engine hard and not letting it idle for long periods will minimize slobbering. Also a missing or failed thermostat (so the engine runs cold) will make slobbering worse.

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Michael Soldan

11-01-2004 22:26:21




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 Re: Oil coming from muffler in reply to Kyle from Kentucky, 11-01-2004 21:04:25  
You are getting condensed oil known as blow-by building up in your muffler. You will see it more in cold weather and running your tractor for short periods of time. If you worked the tractor hard all afternoon it would all burn off. You may have rings sticking, try a can of Risolone in the oil or even a quart of automatic transmission fluid into the oil, both of these will loosen sticking rings and valves. Give the tractor a good work out, avoid letting it sit idling. What you are getting is not uncommon. I have a Case 300 that will buid up oil in the muffler if it doesn't get a good workout once in a while...Mike in Exeter Ontario

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Kyle from Kentucky

11-02-2004 10:59:45




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 Re: Oil coming from muffler in reply to Michael Soldan, 11-01-2004 22:26:21  
Is Marvel Mystery Oil the same as Risolone? I already added that when I changed the oil a week ago. When you say sticking rings do you mean dry and poorly lubricated, or gooey?



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Michael Soldan

11-02-2004 14:54:47




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 Re: Oil coming from muffler in reply to Kyle from Kentucky, 11-02-2004 10:59:45  
Kyle, sticking rings simply mean that the ring groove is built up with carbon and goo from the cylinder walls and the rings are not floating in the ring grooves but are stuck solid in the position they are in.This might allow extra oil burning.Detergent oils are supposed to clean this gunk out of the engine but as has been pointed out if detergent oils were not used there's a lot of goop to be cleansed out and that can lead to some problems. Using marvel mystry oil or Risilone will remove a lot of the goop but you should drain the crankcase and start over with fresh oil after you have given it a good work out with the additive in the oil. good luck with the tractor...Mike in Exeter Ontario

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