Is It Normal for White Smoke to Come Out of a Diesel Engine's Exhaust Pipe?

[LoganLee]

White smoke coming out of a diesel engine's exhaust pipe is not normal. The reasons for white smoke from a diesel engine's exhaust pipe are as follows: Reason 1: The ambient temperature is too low, causing the engine temperature to be too low, which results in some diesel in individual cylinders not burning or burning poorly. The unburned diesel turns into oil vapor and is discharged from the exhaust pipe along with the exhaust gases. Reason 2: There is moisture in the fuel or combustion chamber. The water is heated by the heat released during combustion in the cylinder and turns into steam, which is discharged from the exhaust pipe, forming white smoke. Reason 3: The fuel injection timing is incorrect, and the injection time is too late. Due to the delayed injection time, the cylinder temperature has already dropped when the fuel is injected, causing some diesel to not burn and turn into oil vapor, resulting in white smoke from the diesel engine's exhaust pipe.