While having a discussion, Technician A says that runout can be a result of hub distortion caused when lug nuts are tightened with an impact wrench. Technician B says that it can be caused by dirt or rust on the mating surfaces of the rotor and hub. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. Runout can indeed be caused by hub distortion from over-tightening lug nuts with an impact wrench, as well as by dirt or rust on the mating surfaces of the rotor and hub, which can prevent the rotor from sitting flush.

While Having a Discussion, Technician a Says That Runout Can