An interference engine has enough clearance between the pistons and valves so that it will not bend the valves if the timing belt breaks, slips, or skips.

Question

Quizplus · Accepted Answer

In an interference engine, there is not enough clearance between the pistons and valves, so if the timing belt breaks, slips, or skips, it can lead to the pistons hitting the valves, potentially causing significant engine damage, including bent valves.

An Interference Engine Has Enough Clearance Between the Pistons and Valves