What Causes Engine Belt Noise?

[VanArya]

Engine belt noise is caused by belt looseness. In such cases, it is recommended to visit a repair shop to adjust the belt tension. Belt slippage produces a screeching sound, and the resulting friction-induced high temperatures further stretch the belt, worsening the slippage and creating a vicious cycle. Therefore, timely adjustment of belt tension is necessary. If the belt hasn't been replaced after nearly 20,000 kilometers of driving, it should be replaced directly. The timing belt is a crucial component of the engine's valve system, ensuring accurate intake and exhaust timing through its connection to the crankshaft and a specific transmission ratio. Belts are used instead of gears for transmission because they produce less noise, have minimal self-variation, and are easier to compensate for.