Emissions and Exhaust Systems
Head Gaskets and Valve Covers
Mufflers and Tailpipes

What does it mean when Exhaust is blowing blue smoke?

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Answer

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Wiki User
01/01/2007

If it blows blue smoke when starting up, that is usually the valve guides need replacing. If it constantly blows blue smoke, you are looking at piston rings. Either way oil is getting into the combustion chamber. If it's valve guides, you need to have the heads looked at, if it is rings, the bottom of the engine needs to come out.