- Coolant leaking into the combustion chamber: This can occur if the head gasket is blown, or if there is a crack in the cylinder head or engine block. When coolant mixes with the air/fuel mixture and burns, it produces a white smoke.
- Worn piston rings: Worn piston rings can allow oil to leak into the combustion chamber, which then burns and produces white smoke.
- Dirty air filter: A dirty air filter can restrict airflow into the engine, causing the fuel mixture to run rich and produce white smoke.
- Faulty fuel injector: A faulty fuel injector can cause the engine to run rich, which can also produce white smoke.
- Catalytic converter failure: A failed catalytic converter can no longer convert the harmful pollutants in the exhaust into harmless substances, and as a result, white smoke may be emitted from the exhaust.
