What Causes the Timing Chain Noise in the Highlander?

[Iker]

The timing chain noise in the Highlander is caused by a lack of tension in the chain tensioner, elongation of the timing chain, or abnormal wear of the guide chain plate. Below are specific details about the timing chain: 1. Function: The engine timing chain drives the valve train of the engine, ensuring that the intake and exhaust valves open or close at the appropriate times to allow normal air intake and exhaust in the engine cylinders. In some models, such as the Volkswagen Jetta, Bora, and Audi, it also drives the water pump. 2. Effects of Timing Chain Elongation: Under high-speed engine operation, the timing chain may stretch, wear, and develop increased gaps. If the timing chain elongates due to these gaps, it can lead to inaccurate timing and increased noise. If the timing chain wears or stretches due to aging, causing timing misalignment, the valve stems may bend, the piston tops may dent, and in severe cases, the cylinder head may be damaged, preventing the engine from functioning properly.