10 faults of high temperature engine oil

In addition to the daily use and maintenance of the engine, the engine oil is also a problem that many drivers ignore in their work. If the temperature and pressure of the oil are abnormal, the engine will also have various problems and even strike. If the oil temperature exceeds 120°C for a long time, it will lose its functions of lubricating, cleaning and heat dissipation.

Here is a collection of 10 reasons for the high temperature of the oil.

1、Insufficient oil or too much oil

Too much oil will create more resistance for the engine, and insufficient oil will have a negative impact on lubrication and heat dissipation, so when changing the oil, we should strictly follow the scale of the oil dipstick.

2. Oil pump failure

通常情况下，车辆的仪表盘都集成了机油压力过低的报警装置，如果在工作时发现仪表盘相应故障指示灯亮起，说明机油油泵出现故障，应立即找专业维修人员进行修理。除了机油本身之外，油泵也是造成机油油压异常的一个原因。Usually, the instrument panel of the vehicle is integrated with an alarm device for low oil pressure. If the corresponding fault indicator light of the instrument panel is found to be on during work, it means that the oil pump is faulty, and you should immediately seek professional maintenance personnel for repair. In addition to the oil itself, the oil pump is also a cause of abnormal oil pressure.

3. The cooling water temperature is too high

If the temperature of the water cooling system in the engine is too high, the engine parts cannot be cooled in time and the heat is taken away, then the heated parts will also indirectly lead to an increase in the oil temperature.

 Therefore, regularly check important components such as water pumps and oil coolers in the engine cooling system to ensure that the engine's own cooling system works normally.

4. The oil cooler is blocked

If the oil cooler is blocked, it will directly affect the normal heat dissipation of the oil, and it will also cause other problems such as insufficient oil pressure.

During daily maintenance, the oil cooler should also be checked regularly, and if any problem is found, it should be cleaned or replaced in time.

5.The filter is blocked

When replacing the oil, the filter should also be replaced. If it is not replaced for a long time, it will directly cause the filter to be blocked and lose the function of intercepting impurities in the oil. At this time, the oil will flow back to the engine directly from the bypass valve, causing the engine Increased internal wear.

6. The piston ring is not tightly sealed

If the engine piston ring is not tightly sealed, the oil temperature will also be too high. When the cylinder leaks, resulting in excessive crankcase ventilation, the oil will be discharged outside the engine with the ventilation. Therefore, it is also very important to regularly check the tightness of engine piston sealing rings and cylinders.

7. The bearing bush clearance is too large

The bearing bush fit clearance is too large, and the oil leakage is too much, resulting in too low oil pressure, unable to form a normal oil film, and aggravating wear.

8、Engine heavy load running

When the engine is working under heavy load, that is, working in an overloaded state, it will also cause the temperature of the oil to rise. After all, the higher the pressure, the higher the heat emitted by the engine.

When the oil cannot meet the needs of the engine for heat dissipation in time, the temperature will also increase, so we should try to avoid the engine working for a long time under overload conditions.

9. Engine assembly is too tight

Like other mechanical systems, when the internal mechanical parts of the engine are assembled too tightly, the frictional resistance will rise linearly, and at the same time, a high amount of heat will be generated, which will increase the thermal load received by the oil, exceeding the original thermal load working coefficient.

If this kind of problem occurs in a new car or an overhauled engine, it usually takes a period of time to run in to solve it. If there is no change after running in, it should be returned to the factory for maintenance in time.

10. Inferior engine oil

If you use oil that does not match the engine, as well as low-quality oil, the friction coefficient inside the engine will also increase, making the temperature rise more obvious, and at the same time causing the oil temperature to rise.