Does the Passat's timing chain need to be replaced?

[June]

When the wear on the timing chain and guide plate exceeds the adjustment range of the tensioner, the timing chain and guide plate need to be replaced. Introduction to Timing Chains: The main function of the engine timing belt is to drive the engine's valve train, ensuring that the intake and exhaust valves open or close at the appropriate times to allow the engine cylinders to intake and exhaust normally. In some models, such as the Volkswagen Jetta (EFI), Santana 2000, Bora, and Audi, the timing belt also drives the water pump. Purpose of Timing Chains: With continuous advancements in automotive technology and industrial development, timing belts in some engines have been replaced by timing chains. Compared to traditional belt drives, chain drives offer more reliable transmission, better durability, and space-saving benefits. The entire system consists of gears, chains, and tensioning devices, among which the hydraulic tensioner can automatically adjust the tension to keep the chain tension consistent. It is maintenance-free for life, matching the engine's lifespan. This not only enhances safety and reliability but also significantly reduces the engine's usage and maintenance costs, achieving the best of both worlds.