At what mileage should the original timing belt be replaced?

[DelKatherine]

The original timing belt should be replaced every 60,000 to 80,000 kilometers. It is a crucial component of the engine's valve timing system, connecting the crankshaft and camshaft to maintain a specific gear ratio, ensuring accurate intake and exhaust timing in the valve system. If the timing belt breaks while driving, it can cause valve timing misalignment, leading to severe collisions between the valves and pistons, which may result in deformation or breakage. Methods for inspecting the timing belt: 1. Check for wear: Severe wear on an old belt reduces contact area between the belt and pulley. If pressing firmly on the belt causes it to sink into the pulley groove, it needs replacement. 2. Check belt tension: Press firmly with your thumb on the belt between two pulleys. Insufficient tension causes slippage, while excessive tension damages auxiliary bearings. Adjust the tension by loosening the relevant nuts or bolts to achieve optimal tension.