The modern leading engine I just bought is very noisy. What happened?

There may be the following situations:

The viscosity of oil is too high.

Whether the drive belt is loose.

See if the water thermometer is normal.

Maybe the car throttle, air intake and fuel injector should be cleaned.

You should check the sealing strip of the vehicle to see if it is aging.

Engine is one of the most important assemblies of automobiles and construction machinery, and it is the source of power.

Because of the complex structure and bad working conditions, the engine failure rate is the highest, which often becomes the key diagnosis and detection object.

The change of engine technical condition is mainly manifested in the increase of faults, the deterioration of performance and the increase of losses.

The main parameters used to evaluate the technical condition of the engine include output power, fuel consumption, oil consumption, cylinder pressure, oil pressure, engine temperature, abnormal noise and vibration.

Generally speaking, the higher the rotating speed, the stronger the mechanical abnormal sound. ?

The sound is not easy to distinguish. Therefore, the diagnosis speed is not necessarily high speed, and abnormal sound should be treated specifically.

For example, when the valve ring and piston knock on the cylinder, it can be heard very clearly at idle speed or low speed.

When the main bearing ring, connecting rod bearing ring and piston pin ring are serious, they can also be heard at idle speed and low speed.

In a word, the diagnosis of abnormal reaction should be carried out at the speed with the most obvious noise, and as low as possible.