What's the clatter of the car engine?

Valve sound is abnormal. The "clicking" sound of the engine after driving is the sound of the valve door, especially after the cold car is started, because the oil pressure has not yet gone up and the valve has not been lubricated, and it will be fine soon.

There are many reasons for abnormal engine noise, such as abnormal engine belt noise. It is a "squeak" sound, such as generator belt, air conditioning belt, steering booster pump belt, etc. Either the belt is too loose or tight, or the belt is aging. It can be solved by adjusting the tightness of the belt, applying butter to the belt or replacing the leather belt.

If the engine lacks cylinders and one cylinder does not work, the engine will lose its balance and produce abnormal noise, accompanied by serious engine jitter and insufficient power. It may be that the ignition module, spark plug and fuel injector are faulty, so the corresponding accessories can be replaced.

If the sound keeps ringing, it may be that the valve clearance is too large or the camshaft leaks oil, so it is necessary to adjust the valve clearance or replace the relevant oil seal.

It is also possible that the oil used is unqualified. For example, the oil used by vehicles with high mileage is relatively thin, which can be eliminated by replacing the oil;

Because the direct injection of diesel engine will produce great explosive force, these explosive forces will form shock waves and push them to the piston. This force is much larger than that of EFI engine. So the sound of the shock wave colliding with the piston will be louder. If you listen to it from the outside, it will form a unique click sound of diesel engine.

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