How often should the engine pulley of a car be replaced?

[AndresAnn]

The engine pulley of a car should be replaced every 2 years or 60,000 kilometers. Since the pulley and the belt work together, they should be replaced simultaneously. Installing a car engine pulley is a highly complex task, so it is recommended not to attempt it yourself; instead, have it installed by professional 4S shop personnel. The belt and pulley are crucial components of the engine's valve timing system, ensuring the accuracy of intake and exhaust timing through their connection to the crankshaft with a specific transmission ratio. Pulleys fall under the category of hub-like parts, generally relatively large in size, and are typically manufactured through casting or forging processes, with cast steel rarely used. Smaller-sized pulleys can be designed as forged components, usually made of steel.