Why is white smoke coming from the exhaust pipe after changing the engine oil?

[DelCassandra]

White smoke coming from the exhaust pipe after changing the engine oil can be caused by the following reasons: White smoke emission: When diesel engines have delayed fuel injection, low injection pressure, or poor atomization, white smoke may be emitted. During cold starts in winter, white smoke from the exhaust pipe is normal and should gradually disappear after running for a while. Poor fuel injector atomization: Poor atomization can cause incomplete combustion of diesel, leading to white smoke. This can be resolved by repairing the fuel injector. Low cylinder pressure: Some diesel fuel may turn into vapor without being burned, resulting in white smoke from the exhaust pipe. Damaged cylinder head gasket: If the engine has been used for a long time, the cylinder head gasket may be damaged or the cylinder itself may be compromised, allowing coolant to enter the cylinder. In this case, replace the cylinder head gasket and tighten the cylinder head bolts in the correct order using a torque wrench. Alternatively, prolonged engine use may cause uneven contact between the cylinder head and block, requiring the cylinder surface to be machined flat using specialized equipment.