What is the purpose of the engine timing belt or chain?

The engine timing belt or chain serves the critical function of synchronizing the rotation of the crankshaft and camshaft. This synchronization is essential because it ensures that the engine’s intake and exhaust valves open and close at the right times during the engine's four-stroke cycle. If the crankshaft and camshaft are not properly synchronized, it can lead to inefficient engine performance, misfiring, or even severe engine damage due to valve collisions with the pistons.

Maintaining precise timing is crucial for proper engine operation, as it directly influences the engine's efficiency, power output, and overall performance. Consequently, the timing belt or chain plays a vital role in keeping the combustion process regulated, which allows for optimal fuel combustion and power generation within the engine.