What does a timing belt do in an engine?

The timing belt's primary function in an engine is to synchronize the rotation of the crankshaft and the camshaft. This synchronization is crucial because it ensures that the engine's valves open and close at the appropriate times in relation to the position of the pistons. As the crankshaft turns, the timing belt drives the camshaft, allowing for precise control over the timing of the valve operation, which is essential for optimal engine performance.

If the timing is off, it can lead to issues such as misfires, engine noise, or even severe engine damage in some cases. Proper tension and condition of the timing belt are vital for maintaining this synchronization, which is why regular inspections and timely replacement are part of standard vehicle maintenance. The other options do not relate to the function of the timing belt in an engine, as cooling, providing power to the starter motor, and filtering oil involve different systems and components.