White smoke: Uncombusted fuel that has been vaporized and then discharged.
• White smoke is generated when combustion occurs at a relatively low temperature, resulting in the exhaust of uncombusted fuel and oil particles. White smoke is most likely to be generated when combustion chamber temperature
Source of White Smoke
1 Late Injection, Timing Fuel is injected when the piston is in the down stroke.
2 Cold Engine, Ignition occurs late and combustion is prolonged.
3 Poor Fuel Combustibility
4 Rise and Fall of Oil Pressure, Oil undergoes partial thermal breakdown.