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Diesel engine emits white smoke when working

Dec. 25, 2023

Fault Analysis on Diesel Engine Failure to Start (3)

Diesel engine emits white smoke when working

(1) Check the water temperature


If the water temperature of the diesel engine is too low, the temperature in the combustion chamber of the diesel engine will be too low. After the diesel is injected, it will not be easy to atomize and burn. Some diesel will still be discharged with the exhaust in the form of mist droplets, and the smoke will be white. When the diesel engine is working, when the water temperature is below 67°C, it is called a cold state. Working in a supercooled state is very detrimental to the life of the diesel engine. Active measures should be taken to prevent the diesel engine from working in a supercooled state. After the diesel engine is started, it should idle for 3-5 minutes, and then work at medium throttle and medium and small loads to warm up the engine slowly. After the water temperature of the diesel engine reaches the green range of the water temperature meter, it can then work at high throttle.


(2) Check and adjust the injection advance angle


If the injection advance angle is too small, the diesel will not be atomized and burned after injection. The oil mist will be brought out with the exhaust, and the smoke will be white or off-white.


(3) Check diesel fuel quality


If the quality of diesel fuel is poor, or the diesel contains too much water, it will generate too much water vapor when burned, and it will be discharged as white or off-white smoke.




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