What are the symptoms of tooth skipping in the car timing chain

Incorrect timing teeth in a car can cause the crankshaft and camshaft timing to not align, resulting in inaccurate ignition timing. The car may experience unstable idling, shaking, and abnormal engine speed. How to quickly determine the timing and misalignment of teeth?

1、 It can be judged by the operation of the car engine:

1. There is a slight noise when the car is idling; Significant noise at medium speed; Noise becomes chaotic or disappears at high speeds; When accelerating rapidly, the sound reappears, and in severe cases, there is vibration in the timing gear compartment cover. This situation indicates that the meshing clearance of the timing gear is too large.

2. After major repairs or replacement of the timing gear, there is a continuous noise, with higher speeds resulting in louder noises, especially during rapid acceleration. This situation indicates that the meshing clearance of the timing gear is too small.

3. When idling, a rhythmic sound can be heard, which increases as the engine speed increases. This situation indicates uneven meshing of the timing gears.

4. When idling, there is a clear rhythmic metallic impact sound, and as the engine speed increases, the sound intensifies. This situation indicates that the timing gear has undergone axial displacement or has

Individual gear teeth are damaged.

2、 Symptoms of timing chain tooth jumping

The timing transmission device of a typical car engine is a toothed belt transmission. If regular maintenance and adjustment are not carried out, the timing belt may jump teeth, resulting in abnormal engine noise, poor acceleration, and weak refueling. If the jumping teeth are severe, the engine will experience shaking, which may also cause difficulties in starting the car and even damage the valves.