Which of the following is most likely to cause a light tapping or ticking noise from the engine?
A) Worn rod bearings
B) Incorrect crankshaft end play
C) Incorrect valve adjustment
D) Worn timing chain

Question

Quizplus · Accepted Answer

An incorrect valve adjustment can cause a light tapping or ticking noise from the engine as the valves may not be opening or closing properly. Worn rod bearings (A) typically produce a knocking noise, while incorrect crankshaft end play (B) and a worn timing chain (D) usually result in a rattling or clattering noise.

Which of the Following Is Most Likely to Cause a Light