Technician A says cylinder taper wear causes changes the end gaps of the piston rings to change. Technician B says if there is too much taper wear, out-of-round wear occurs. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question

Quizplus · Accepted Answer

Technician A is correct because when cylinder taper wear occurs, the diameter of the cylinder at the top (near the head) is larger than the diameter at the bottom (near the crankcase). As a result, the piston ring end gaps near the top of the cylinder will be larger than those near the bottom. Technician B is also correct because if there is too much taper wear, it can lead to out-of-round wear, which means the cylinder bore is no longer circular and can cause problems with piston ring sealing and compression.

Technician a Says Cylinder Taper Wear Causes Changes the End