Technician A says that camshaft end thrust on a pushrod engine with a camshaft-driven oil pump results from resistance of oil being pumped by the oil pump. Technician B says that flat tappet camshafts are usually inspected by visually checking the wear pattern on the lobes for edge loading. Who is right?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Question

Technician ​A says that camshaft end thrust on a pushrod engine with a camshaft-driven oil pump results from resistance of oil being pumped by the oil pump. Technician B says that flat tappet camshafts are usually inspected by visually checking the wear pattern on the lobes for edge loading. Who is right?
A)Technician A only
B)Technician B only
C)Both A and B
D)Neither A nor B

Quizplus · Accepted Answer

Technician A is correct because the resistance encountered by the oil pump, which is driven by the camshaft, can indeed create end thrust on the camshaft in a pushrod engine. Technician B is also correct because inspecting flat tappet camshafts typically involves visually checking the wear patterns on the lobes to identify issues like edge loading, which can indicate improper contact and wear.

Technician ​A Says That Camshaft End Thrust on a Pushrod

Technician A Says That Camshaft End Thrust on a Pushrod