1. Blown Head Gasket: A damaged head gasket can allow coolant to leak into the cylinders, resulting in white smoke from the exhaust and a milky appearance in the engine oil.
2. Cracked Cylinder Head or Engine Block: Cracks in the cylinder head or engine block can also cause coolant to enter the combustion chamber, leading to white smoke and oil contamination.
3. Faulty EGR System: A malfunctioning Exhaust Gas Recirculation (EGR) system can cause excessive soot buildup, leading to white smoke and oily deposits in the engine.
4. Worn Piston Rings: Worn or damaged piston rings can allow excessive oil into the combustion chamber, resulting in white smoke and oil in the coolant.
5. Turbocharger Failure: A faulty turbocharger can cause engine oil to leak into the intake system, resulting in white smoke and oil contamination.
6. Faulty Fuel Injectors: Malfunctioning fuel injectors can cause incomplete fuel combustion, leading to white smoke and potential fuel dilution of engine oil.
To diagnose the exact cause of the issue, a qualified mechanic should inspect the engine for signs of coolant or oil leakage, check the compression ratio, and perform other necessary tests to identify the root problem.