- Coolant Leaking into the Cylinder Head: If there is a crack in the cylinder head, allowing coolant to leak into it, it can cause the engine to burn coolant, resulting in white smoke from the exhaust.
- Blown Head Gasket: A blown head gasket can also lead to coolant leaking into the combustion chambers, causing the production of white smoke from the exhaust.
- Worn Piston Rings: Worn piston rings can allow excess oil to enter the combustion chamber, resulting in the production of white smoke from the exhaust.
- Faulty PCV Valve: A faulty PCV (positive crankcase ventilation) valve can cause excessive pressure in the crankcase, leading to oil leaks and increased oil consumption, which can also cause white smoke from the exhaust.
- Clogged Catalytic Converter: A clogged catalytic converter can interfere with the proper flow of exhaust gases and cause the engine to run inefficiently, resulting in white smoke from the exhaust.
To determine the exact cause of the white smoke from your BMW exhaust, it is recommended to have the vehicle inspected by a qualified mechanic.
