What is the abnormal noise of Toyota Camry engine?

1. When many new car owners come back from the first warranty inspection service, they will suspect that the car engine has abnormal noise when they open the front cover. If you can't hear the sound in the car, it's not too loud. It is usually the sound of a valve or an injector. The carbon canister solenoid valve also has this sound, but the sound is brittle.

2, there is a way to distinguish, that is, when idling, give a little oil to see if the frequency has changed. If the frequency is constant, it is the sound of the solenoid valve. If the frequency changes, it should be abnormal sound at the valve. If you can't hear clearly in the car, it's no big problem. There will be a corresponding clicking sound of the vehicle, one is the sound of the throttle working, the other is the sound produced by the valve, and there is a similar sound, that is, the sound of the timing chain, but unlike the clicking sound, there is a kind of glaglagla sound.

3. When an ordinary car is cold started, the sound of the engine will be slightly louder than that of a hot car. As long as the sound sounds even, soft and not harsh, there is generally no problem. This is because the gap between the cylinder wall and the piston has not reached the optimal size when the car is cold, and the oil lubrication is insufficient. Usually, when the engine block temperature reaches about 95 degrees, the sound will return to normal.

4. The cause of oil. Inferior engine oil, long-term failure to change engine oil, insufficient engine oil, etc. , it will easily lead to the increase of friction between the valve and the guide tube and the hydraulic tappet, thus making all kinds of sounds in the engine louder.

5. If you are still uneasy after the above investigation, it is suggested to go to the nearest 4S or garage for inspection to confirm the cause of the failure.

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