What happens when the timing chain fails?

[VonElle]

Damage to the car's timing chain can cause engine shaking, poor acceleration, and increased fuel consumption. Below are specific details about the timing chain: 1. Function: The engine timing chain drives the engine's valve train, ensuring that the intake and exhaust valves open and 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: During high-speed engine operation, the timing chain may stretch, wear, and develop increased gaps. If the timing chain elongates due to increased gaps, it will not only cause inaccurate timing but also increase noise. If the timing chain wears or stretches due to aging, leading to timing misalignment, the valve stems may bend, the piston tops may dent, and in severe cases, the cylinder head may be damaged, rendering the engine inoperable.