Piston diagnosis is being discussed. Technician A says scuffing on one skirt only can be caused by excessive low rpm idling. Technician B says scuffing of the piston skirt can be caused by abnormal combustion or cooling system problems. Who is right?
A)Technician A
B)Technician B
C)Both technicians
D)Neither technicians

Question

Quizplus · Accepted Answer

Both technicians are correct. Technician A is right because excessive low rpm idling can lead to insufficient lubrication, causing scuffing on one skirt. Technician B is correct because abnormal combustion or cooling system problems can lead to overheating or detonation, which can also cause scuffing of the piston skirt.

Piston Diagnosis Is Being Discussed