Why does white smoke come from my exhaust pipe?


Quick Answer

Thin, white smoke coming from an exhaust pipe usually indicates normal condensation buildup in the exhaust, but thick, white smoke can indicate a problem like the engine burning coolant, a cracked engine block, a blown head gasket or damaged cylinder head. Thick, black smoke is generally a sign that the engine is burning excess fuel, and is typically not an indicator of as serious a problem as thick, white smoke.

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Full Answer

While a small leak with the coolant may not be a major cause for concern, if it is ignored long enough it can result in some significant repair bills and a good bit of damage to the engine. A leak in the coolant can also mix with other fluids in the vehicle, creating additional issues.

A cracked engine block, blown head gasket or damaged cylinder head are all serious issues, and can result in costly repairs.

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