How often should the timing belt and chain be replaced?

? Vehicles using timing belts should be replaced in strict accordance with the replacement cycle. General vehicles must be replaced when they travel to 60,000 ~ 65,438+10,000 kilometers. The specific replacement cycle is subject to the vehicle maintenance manual. Besides belts, tensioners and idlers should also be replaced, as should some cars and water pumps. The key is that the working hours are also high. If it is not replaced on time, once it is broken, many parts will be damaged, such as valves, pistons and connecting rods, and the maintenance cost will be higher.

The timing chain is generally changed from 65438+ 10,000 km to1.20,000 km. With the use, the chain will wear and stretch, and the guide rail will wear. The hydraulic tensioner will age and protrude too much, resulting in insufficient motivation for price increase. Eventually lead to abnormal timing, engine flameout or abnormal operation. Some models use a lifetime maintenance-free timing chain, which can be replaced. (See vehicle maintenance manual or owner's vehicle manual for details).