What Causes the Noise from the Engine Belt Tensioner?

[LeJordan]

Engine belt tensioner noise is caused by a damaged tensioner bearing. Damaged Tensioner Bearing: The tensioner contains bearings inside. If there is abnormal noise, it indicates that the tensioner bearing is damaged. The engine may experience timing misalignment, ignition and valve timing disorders, affecting the normal operation of the vehicle. If not replaced in time, it may cause engine shaking, difficulty in ignition, or even failure to start. In severe cases, it may deform the valves, damage engine components, or even cause the bearing to seize, preventing the belt from transmitting power normally and leading to vehicle breakdown. Function of the Tensioner: It is used to adjust the tightness of the timing belt, but its lifespan is not very long. Many vehicles experience the tensioner failing before the belt does. Generally, the tensioner is replaced together with the timing belt. It is recommended to replace the tensioner every 3-5 years or approximately every 80,000-100,000 kilometers.