A timing chain is a crucial component in an internal combustion engine that synchronizes the rotation of the crankshaft and camshaft. This synchronization ensures that the engine's valves open and close at the correct times during the combustion cycle, allowing for efficient engine performance. Unlike a timing belt, a timing chain is made of metal and is generally more durable, often lasting the lifetime of the engine. Over time, however, a timing chain can stretch or wear out, leading to potential engine problems. If the timing chain fails, it can cause severe engine damage, as the pistons and valves may collide. Regular maintenance and inspections can help ensure the timing chain remains in good condition, contributing to the overall health of the engine.