Yuchai Guo Si refueled and didn't smoke, so he let go of the throttle and emitted white smoke.

Diesel is not good. Low-quality fuel burns incompletely and evaporates.

2

The injector has oil droplets, which is often said that atomization is not good. Bad mouth. Or the oil outlet valve of high-pressure pump is worn, stuck and has clearance problems.

three

There is too much water in the fuel, and the daily maintenance has not been done for a long time, and the sediment in the diesel tank has not been discharged often, resulting in too much water storage. On rainy days, the fuel tank cover is not tightly covered or washed clean, and water enters the fuel tank.

four

There is a crack in the water channel of the cylinder head. Cylinder liner is damaged. A small amount of water enters the combustion chamber to form white smoke. Check the water tank and check the cylinder gasket.

five

Cracks in the cylinder liner are common in old cars. Due to the long-term disrepair of the cylinder liner and serious cavitation or water erosion, mottled pit water enters the combustion chamber and forms gray or white water vapor. The cylinder liner is seriously leaking oil, and sometimes the sound of water dripping into the oil pan can be heard at the oil filler when stopping.