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Couple things. 1- worn valve seals letting oil in the combustion chamber. 2- worn piston rings -same result. You probably have a cracked head on the exhaust port.

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Q: What could white smoke coming from the exhaust manifold mean?
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When your driver side of the engine is smoking what do it means?

It's difficult to say, without seeing where under the hood it's coming from. You could have a bad exhaust manifold gasket, leaking exhaust. You could have valve cover gaskets leaking or seeping oil, which would drain onto the hot exhaust manifold, and burn off... If you can provide more information on where the smoke is coming from, there may be a better answer.


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