Technician A says that main bearing caps are interchangeable. Technician B says that main bearing bores are checked for alignment with a straightedge and feeler gauge. 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 incorrect because main bearing caps are not interchangeable. Each main bearing cap is matched to its corresponding main bearing journal and if they are mixed up, the engine will not run properly. 
Technician B is correct because main bearing bores should be checked for alignment with a straightedge and feeler gauge to ensure that the bearings will mate properly with the journals.

Technician a Says That Main Bearing Caps Are Interchangeable