Disc Thickness and Parallelism

Thickness and Parallelism Inspection

1. Support the front of the car on safety stands and remove the front wheels.

2. Remove the front brake pads. Service and Repair






3. Using a micrometer, measure disc thickness at eight points, approximately 45° apart and 10 mm (0.4 in) in from the outer edge of the disc.

Brake disc thickness:
Standard: 28.0 mm (1.10 in)

Brake Disc Parallelism: 0.015 mm (0.0006 in) max.

NOTE: This is the maximum allowable difference between any thickness measurements.

4. If the disc is beyond the limits for parallelism, refinish the disc with an on-car brake lathe. Be sure to install washers and nuts to hold disc securely to hub. Torque to 110 Nm (11 kg-m, 80 lb-ft). The KwikLathe produced by Kwik-Way Manufacturing Co. and the "Front Wheel Drive Disc Brake Lathe" offered by Snap-on Tools Co. are approved for this operation.

Max. Refinishing Limit: 26.0 mm (1.02 in)