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ea82 black muck coming out of exhaust?


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Hello All! Now that it is snowy here I am noticing a trail of black muck that comes out of my tailpipe when the car is warming up. It is a 92 loyale ea82 wagon that just had "new" lifters, heads and gaskets installed. I think it did this beforehand also. Is this just blow by on the rings with a cold engine, or should I be more concerned?

 

-Richard

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The combustion process produces water vapor. When you first start the car up, the exhaust system is cold, and the hot water vapor condenses on the inside of the exhaust. This water is blown down the exhaust pipes, and along the way it picks up carbon soot that had been left on the inside of the exhaust by running the engine before. When the exhaust system temperature comes up to the same temp as the exhaust gas, the water doesn't condense and the carbon dries out and re-ahere's to the walls of the exhaust system.

 

It's normal.

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