What is the oil dripping from diesel engine exhaust?

1. Aging of valve oil seal. Long-term use may lead to the aging of engine valve oil seal, leading to the decline of sealing performance and oil dripping, so it is necessary to replace the valve oil seal with a new one.

2. The piston is damaged. It may be that the piston and its surroundings, such as cylinder liner, piston pin and piston ring, are damaged, so you need to go to the auto repair shop to find the damaged parts for repair or replacement.

3. The valve stem is badly worn. Long-term use may cause serious wear between the valve stem and the valve guide, and excessive clearance may lead to oil dripping from the clearance, so it is necessary to replace the corresponding parts.

4. The gap is too big. It may be that the clearance between the piston and the cylinder wall is too large during installation, and oil will leak if the required temperature is not reached for a long time, so it needs to be reinstalled.

5. The ventilation system is damaged. It may be caused by the damage of the crankcase forced ventilation system, and it is necessary to go to the repair shop to repair the crankcase forced ventilation system.

6. The air filter leaks oil. There may be too much oil in the air filter, so it is necessary to reduce the amount of oil in the filter and check the air filter.

7. Engine compartment pressure is too high. It may be that too much oil is added at one time, resulting in excessive pressure in the engine compartment and oil dripping. When you refuel, you should refuel slowly according to the scale line on the fuel tank. Million car purchase subsidy