To decide whether to turn or replace your Camry's rotors, follow these steps:
1. Measure the rotor thickness. Use a micrometer to measure the rotor at several points (inner, middle, outer) and compare to the minimum thickness stamped on the rotor hub. If the rotor is at or below this minimum, replace it—do not turn it.
2. Check for excessive runout or scoring.
- Runout: If the rotor wobbles more than 0.005" when spun, it may need turning (if thickness allows) or replacement.
- Deep grooves or scoring: If grooves are deeper than 0.005", turning may be possible if the rotor is still above minimum thickness.
3. Consider the turning limit. Rotors can typically be turned once or twice, removing about 0.010"–0.020" per side. If turning would bring the rotor below the minimum thickness, replace it.
4. Age and condition. If the rotors are original equipment and have been turned before, or show signs of cracking, replace them rather than risk failure.
Bottom line: Measure thickness first. If it's above spec and the damage isn't severe, turning is acceptable. If it's at or below spec, or the rotor has been turned before, replace it. When in doubt, replace—brake safety is critical.
If you're unsure about measurements or procedures, consult a certified mechanic. Brake work affects vehicle safety.