Answer
May 27, 2025 - 01:52 AM
Hmm, is it a blue smoke? White smoke? Or black smoke?
Each tells a different story, but here’s a quick breakdown:
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Blue smoke = burning oil. Common culprits include worn valve stem seals, piston rings, or a bad PCV (positive crankcase ventilation) system, which the N62 engine is known to have issues with.
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White smoke = coolant getting into the combustion chamber. Could be a blown head gasket or cracked cylinder head.
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Black smoke = running rich (too much fuel). Might be a bad MAF sensor, leaky injector, or stuck open fuel pressure regulator.
If it happens mostly on startup, especially blue smoke, it’s likely oil seeping past valve seals overnight. Either way, the repair manual covers full engine diagnostics and teardown procedures to help you troubleshoot it properly.
Good luck!
