Normally, the timing chain does not need to be replaced. The service life of the timing chain is the same as that of the engine. It can be driven to scrap and is free of maintenance for life.
First of all, time gauge means timing. In other words, the timing chain is the timing chain. Time rules are a popular term for professionals.
In fact, you can check every service after 100000 km to see if there is any abnormality (such as wear or elongation). If there is any abnormality, you need to replace it in time. If there is no abnormality, you don't need to replace it. You can continue to use it.
You can also check the vehicle operation manual (maintenance manual), which will give a detailed explanation.
The timing chain is the evolution version of the previous automobile timing belt, which can also be called the upgraded version.
Most of the early models used timing belts. The timing belt is usually replaced after about 80000 km.
Most of the current models use timing chains. Because they are long-acting, they do not need to be replaced.
The timing chain is an important part of the engine valve distribution system, which ensures the accuracy of the intake and exhaust time by connecting with the crankshaft and matching with a certain transmission ratio. Generally speaking, it is to control and adjust the opening and closing time of inlet valve and exhaust valve.