Other reasons:
Abnormal engine wear. Because the friction parts are not fully and effectively lubricated during the use of the engine, for example, the engine works without oil for a long time; Long-term non-replacement of oil and filter, cold engine, large throttle operation, etc. , will cause abnormal engine wear, leading to oil leakage and combustion, resulting in blue smoke.
Excessive addition of engine oil: due to excessive addition of engine oil, the oil level rises, which intensifies the upward channeling of engine oil and increases the possibility of engine oil entering the cylinder for combustion. This situation can easily cause the engine to produce a lot of blue smoke. In this case, the blue smoke can be eliminated by releasing excessive engine oil.
Extended data:
Precautions:
1. Before starting, check whether the engine oil is within the scale line specified in the engine oil meter, whether the engine oil quality meets the requirements, and make sure to fill the engine oil as required, and check whether the circulating water is full.
2. Before driving, warm up the car at idle speed 15 minutes, observe whether the oil pressure is normal, and then observe whether the cooling water is filled up, whether the circulation is normal, and whether there is water leakage, oil leakage and air leakage.
3. The speed of transport vehicles and tractors should be controlled within 40km/h and 15km/h, before each cold truck goes on the road. When the water temperature reaches above 75℃, it runs at normal speed. In this way, the cylinder liner, bearing bush and other parts can be well and fully lubricated, and the moving friction surface can be ground into a mirror surface, thus greatly improving the diesel engine.
4. Observe whether the oil pressure, water temperature, sound, smoke and smell of the diesel engine are normal while driving. If there is any abnormality, stop immediately for inspection, and then continue driving after troubleshooting, otherwise the fault hazard will be enlarged due to improper operation.
Baidu encyclopedia-diesel engine
Baidu encyclopedia-valve oil seal
Baidu encyclopedia-friction component