Disc brake rotor conditions are being discussed. Technician A resurfaces the rotor if it has lateral runout, lacks parallelism, or is scored. Technician B resurfaces both the left and right rotors even if only one rotor has problems. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. Technician A resurfaces the rotor for valid reasons such as lateral runout, lack of parallelism, or scoring, which are common issues that can affect braking performance. Technician B follows a best practice by resurfacing both rotors on the same axle to ensure they are uniform in thickness and surface condition, which helps maintain balanced braking and prevent future problems.

Disc Brake Rotor Conditions Are Being Discussed