(1) check the temperature of the diesel engine water temperature is too low, the low temperature combustion of diesel engine, diesel spray easily after atomization combustion, is still part of the diesel exhaust with fog, smoke is white. When the diesel engine works, when the water temperature is below 67 degrees C, it is called cold state; the diesel engine is working in the cold state, which is very unfavorable to the service life. Therefore, the diesel engine should be taken active measures to prevent the diesel engine from working in the cold state. Start the engine, idle speed should be up to 3-5min, and then to work in small throttle, load, to slow to warm up, the diesel engine water temperature reaches the temperature range of green, and then work with the throttle.

(2) check and adjust the speed of the advance angle of fuel injection advance angle is too small, too late, diesel spray into the atomization combustion, oil mist with the exhaust smoke was brought out, white or grey white.

(3) check the quality of diesel fuel, poor quality of diesel, or excessive moisture in diesel oil, combustion will produce excessive water vapor, white or gray smoke discharge.