What is one of the functions of tappets in an engine?

Tappets play a crucial role in the operation of an engine by actuating, or operating, the engine valves. They are mechanical components that transfer the motion from the camshaft to the valves, allowing them to open and close at the appropriate times during the engine cycle. This synchronization is essential for maintaining proper airflow and fuel mixture in the combustion chamber, which is vital for engine performance and efficiency.

By enabling precise control over the timing of the valve movements, tappets contribute to optimal engine operation, preventing issues like misfiring or inefficient combustion. Their proper functioning ensures that the engine breathes correctly and operates smoothly, making tappets integral to the overall performance of an internal combustion engine.