The problem of burning engine oil in laotuan

Based on comprehensive maintenance experience and vehicle characteristics, the reasons for burning engine oil can be roughly summarized as follows:

1, because the domestic fuel quality is not synchronized with the international standards, a large amount of carbon deposits are easily formed in the combustion chamber during the running of the engine, which is the root cause of various problems of the engine.

2. The carbon deposit will be deposited in the groove of the piston, which will cause the piston ring to stick together, thus causing the piston ring to be stuck and unable to seal completely. The "stuck" piston ring greatly reduces the oil scraping sealing ability. In addition, sludge will also block the oil return hole, and the oil will not flow back normally, resulting in an increase in fuel consumption.

3. Carbon deposition will aggravate the wear between the piston and the cylinder wall, resulting in excessive clearance, which will lead to oil entering the combustion chamber.

4. The valve oil seal is corroded and aged, and the seal is poor. It can be said that the valve oil seal is the most vulnerable part of the engine, which is basically the problem for cars that have traveled more than 654.38+10,000 kilometers.

5. The front and rear crankshaft oil seals are aging, and the front and rear crankshaft oil seals are in continuous contact with engine oil in a large area. Impurities in the engine oil and continuous temperature changes in the engine gradually weaken the sealing effect, leading to oil leakage or oil leakage.

6. The oil seal between the turbocharger and the intake pipe is damaged, which is mainly due to the long oil change cycle or insufficient lubrication and heat dissipation of the floating turbine spindle due to the use of inferior oil, thus damaging the oil seal.

7. Engine oil contains a high proportion of fuel. If the fuel supply system is not working properly and the fuel atomization is not good, fuel or a large amount of over-concentrated fuel mixture will run into the crankcase to mix with the engine oil and dilute the engine oil.

8. The air filter is blocked, which will lead to poor air intake, reduce the air intake pressure, and form negative pressure, so that the engine oil is sucked into the combustion chamber under negative pressure to cause engine oil combustion.

9. The oil filter is blocked, resulting in an increase in oil consumption.

10. The waste gas valve (PVC valve for oil-gas separator and crankcase ventilation) is blocked or damaged. After the oil-gas mixture solidifies here, it will enter the air inlet along the exhaust gas recovery pipe, resulting in oil consumption.

1 1, the piston ring is misaligned and centered, but this situation is rare and the probability of occurrence is very small.

12, excessive refueling, exceeding the upper limit of scale.

13, the throttle is dirty.

As can be seen from the above, the reasons for burning oil are very complicated, which is also an important reason why burning oil has become a long-standing problem in the industry. However, some of the above reasons are easy to judge and solve, such as excessive oil filling, air filtration, mechanical filtration, damaged waste gas valve (oil-gas separator, PVC valve), unclean throttle, etc., which can be solved by almost any simple garage. However, the condition of the waste gas valve can not be ignored and should be carefully checked. If there is any problem, please solve it immediately.