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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.

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Q: What does it mean when Exhaust is blowing blue smoke?
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What does blue smoke out the exhaust mean?

burning oil


What does it mean when exhaust is blowing black and blue smoke?

Black and blue smoke means your engine is burning oil. That is bad. You may have a blown head gasket. That is very bad. You may have worn piston rings. That is also bad. I have no idea why your engine is burning oil but the reason is bad.


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The piston rings in the motor are bad. Very expensive fix.


What does blue exhaust mean?

blue exhaust is usually due to excessive lubricating oil consumption and its emission indicates a very poor condition of the engine, such as worn out piston rings or valve guides, etc beside, as it possible to completely prevent the emission of blue smoke...


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Unburnt fuel.


What does a small amount of white smoke coming from the exhaust pipe mean?

You may have oil on the exhaust, once this has burnt off the smoke should stop.


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Does aeroplane emit smoke if not where does the exhaust gases go?

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