What are the solutions for timing belt noise?

[Lynda]

Here are the solutions for timing belt noise: 1. Identify the cause of abnormal noise: When abnormal noise is detected from the timing belt, first determine whether the noise is caused by the belt itself or by damage to the timing belt tensioner or idler pulley. 2. Belt cracking: Open the cover of the timing belt to expose the belt and pour water on it. If the noise disappears or significantly decreases, it can be confirmed that the noise is from the timing belt. Inspect both sides of the timing belt for fine cracks. If the mileage exceeds 60,000 kilometers and cracks are present, replace the timing belt directly. If the mileage is low and there are no signs of cracking, adjust the belt tensioner to tighten the belt. 3. Pulley noise: If noise persists after pouring water on the belt, the noise is not from the belt. Remove the outer cover of the belt and use a stethoscope to check if the noise is from the belt tensioner or idler pulley. The pulleys have bearings that are prone to damage and noise. Replace the problematic pulley.