Brake Rotor/Disc: Testing and Inspection
FRONT ROTORRubbing Surface
Check rotor for roughness, cracks or chips.
Runout
1. Secure rotor to wheel hub with at least two nuts (M12 x 1.25).
2. Check runout using a dial indicator.
Make sure that wheel bearing axial end play is within the specifications before measuring.
Maximum runout: 0.07 mm (0.0028 inch)
3. If the runout is out of specification, find minimum runout position as follows:
a. Remove nuts and rotor from wheel hub.
b. Shift the rotor one hole and secure rotor to wheel hub with nuts.
c. Measure runout.
d. Repeat steps a. to c. so that minimum runout position can be found.
4. If the runout is still out of specification, turn rotor with on-car brake lathe ("MAD, DL-8700", "AMMCO 700 and 705" or equivalent).
Thickness
Thickness variation (At least 8 positions): Maximum 0.01 mm (0.0004 inch)
If thickness variation exceeds the specification, turn rotor with on-car brake lathe.
Rotor repair limit: 20.0 mm (0.787 inch)
REAR ROTOR
Rubbing Surface
Check rotor for roughness, cracks or chips.
Runout
1. Secure rotor to wheel hub with two nuts (M12 x 1.25).
2. Check runout using a dial indicator.
Make sure that axial end play is within the specifications before measuring.
3. Change relative positions of rotor and wheel hub so that runout is minimized.
Maximum runout: 0.07 mm (0.0028 inch)
Thickness
Rotor repair limit:
Standard thickness: 9 mm (0.35 inch)
Minimum thickness: 8 mm (0.31 inch)
Thickness variation (At least 8 portions): Maximum 0.02 mm (0.0008 inch)