The exhaust valves shown in the preceding photograph are from a four cylinder interference engine that has failed. All of the valves are bent an equal amount. Which of the following could be the cause?

Question

Quizplus · Accepted Answer

Both a broken timing belt and excessive chain slack can lead to a situation where the timing between the piston and valve movement is lost, causing the valves to collide with the pistons in an interference engine, resulting in bent valves.

The Exhaust Valves Shown in the Preceding Photograph Are from a Four