Why does the timing chain of Audi A4 jump teeth again after replacement?

[Jess]

Audi A4's timing chain jumps teeth again after replacement because the tensioner is broken, which affects the engine timing and causes the teeth to jump. The function of the timing belt: The timing belt is crucial for the normal operation of the engine. Once the timing belt is damaged, the valves and ignition will stop working, and in severe cases, the cylinder head may also be damaged. As the engine operating time increases, the timing belt and its accessories, such as the timing belt tensioner pulley, timing belt tensioner, and water pump, will wear out or age. Therefore, each time the belt is replaced, these accessories should be carefully checked to ensure they are in good condition. Precautions for using the timing belt: During use, regularly inspect the condition of the timing belt. If cracks are seen on the surface of the timing belt, pay attention to whether the belt is aging. If there is abnormal noise while driving, check whether the timing belt is installed correctly.