Black smoke If the engine starts, black smoke comes out of the oil filler port and is accompanied by a knocking sound, indicating that the cylinder liner and piston are worn, the clearance is too large, or the piston ring has leaked.

After starting the white smoke engine, the oil filling port will emit white mist rhythmically, which is a precursor to burning tiles. The high temperatures caused by the dry friction before burning tiles cause the temperature of the local oil to rise sharply, and part of the oil is evaporated into white mist-like particles to exit the crankcase. At this time should be shut down for inspection, can not make do with it, so as to avoid shaft accident.

Sprayer oil If the engine is working from the oil filling port, the engine oil will not only be worn out, but also the piston ring may have been broken or stuck, or the cylinder has been pulled. The combustion chamber's high-temperature and high-pressure gas generates serious " Under the exhaust phenomenon. At this time, the engine power has dropped significantly, and the fuel consumption has increased dramatically. It should be stopped and overhauled immediately.

Abnormal noise If you can hear a short “dang and when” sound at the oil filling port, the sound of the engine will be more pronounced when the engine suddenly accelerates at idle speed, and the higher the rotation speed, the louder the sound will be, and the single-cylinder will be cut off. ) When the sound is weakened or disappears, it can be judged to be abnormal sound caused by the connecting rod bearing, and whether the clearance of the connecting rod bearing is too large or whether the connecting rod bolt is loose or not should be taken into account before troubleshooting.

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