A technician is rebuilding an engine and notices that one tooth is missing from the crank sensor pulse ring. Technician A says the pulse ring must be replaced. Technician B says that the missing tooth is normal and identifies when cylinder #1 is at TDC. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

A technician is rebuilding an engine and notices that one tooth is missing from the crank sensor pulse ring. Technician A says the pulse ring  must be replaced. Technician B says that the missing tooth is normal and identifies when cylinder #1 is at TDC. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Quizplus · Accepted Answer

The missing tooth on a crank sensor pulse ring is a common design feature used to identify the position of cylinder #1 at Top Dead Center (TDC), so Technician B is correct.

A Technician Is Rebuilding an Engine and Notices That One