The engine has been driving a little loudly recently. Should we change the oil?

The engine is the heart of the whole car. I believe everyone knows, but sometimes when we drive, we will find that the engine suddenly sounds much louder than before. So today, let's talk to you about what causes the engine to be loud.

First, if you don't drive for a long time and then suddenly use the car, you will find that the engine sound is relatively loud, which is normal under normal circumstances, because the engine definitely needs oil lubrication. Because you don't drive for a long time, the oil flows to the oil pan, so there is no oil lubrication on the surface, so if you start the car again, the engine sound will be louder.

Second, the oil model is wrong. For example, the engine oil model should be 5W-30, but if it is changed to 5W-40, the viscosity of the engine oil may be higher, and you will find that the engine is not running smoothly and the natural sound will be louder.

Thirdly, about refueling, some cars actually need higher grade oil, but when you go to the gas station to refuel, the oiler inadvertently adds low grade oil to you, which may cause knocking during driving. The sound of the natural engine sounds strange.

Fourth, in terms of engine internal parts, major manufacturers are now fighting price wars. Maybe the former iron clip has become plastic now, and the new car is generally fine, but after a long time, the plastic will inevitably age, so that the parts inside will make abnormal noises.

Fifth, there may be something wrong with the pawl of the engine. The pawls are actually four pawls that support the engine. Generally speaking, they also contain rubber, which has a certain damping effect. If the rubber is aging, all the iron comes into contact with iron, and the natural sound is not small.

Generally speaking, the above conditions are easy to cause loud engine noise, so I warn my friends who have cars that when there is something wrong with the engine, they can also try to check these places.

When the engine is abnormal, we can find the problem by analyzing the abnormal sound of the automobile engine, which can be done. How to solve the problem of high engine noise: check whether the oil pump, cooling system and exhaust pipe are damaged, adjust the valve to check the oil pressure, check whether the muffler and exhaust pipe are damaged, change the oil, filter the engine and clean the engine.

Weather reason: The cold weather causes the idle speed of the engine to rise, and the engine always keeps a high speed when it is cold, so you will feel the engine sound louder. This is a normal phenomenon, so don't worry. In winter, the engine idle speed of almost all cars will increase. When the bus gets hot, the idle speed will drop.

The plastic parts in the engine compartment are loose. Such as an engine cov plate, an intake pipe and that like. , you can fasten it. Abnormal sound of engine belt. Include a booster belt and a generator belt. , belt aging, too loose or too tight will produce abnormal sound, so change or adjust the tightness.

Incorrect condition of engine oil: Engine oil is an important component of engine lubrication, which will affect the working condition of the engine when there is a problem with the engine oil. The high viscosity of engine oil will easily lead to problems in engine operation and poor lubrication, resulting in friction and noise when the engine is running.

Valve air leakage: The sound of valve air leakage is outside the valve chamber, especially at high load and low speed, and the noise increases with the increase of load. The main reason is that when the valve seat is hinged, due to improper operation or excessive wear of the inner hole of the valve guide, the valve seat is tilted or the valve clearance is small, resulting in valve ablation and valve leakage. Remove the cylinder head, grind the valve, check the elasticity of the valve tension spring, and adjust the valve clearance from the beginning.

Do it.