A vehicle with an OHC driven by chain and sprockets is brought into a shop for a noise. While running, a slapping sound is heard from the timing cover. Technician A says that the timing chain may be hitting the cover and this should be addressed right away. Technician B says that timing chains need periodic adjustment and this noise can be corrected without disassembly. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct. The timing chain may be hitting the cover and causing the slapping sound. This issue should be addressed right away before it causes further damage. Technician B is incorrect as timing chains do not need periodic adjustment as they are designed to last the life of the engine.

A Vehicle with an OHC Driven by Chain and Sprockets