Disc Runout

Checking For Disc Runout:

1. Loosen the front wheel lug nuts slightly, then raise the car and support on safety stands. Remove the front wheels.
2. Remove the brake pads, refer to Brakes and Traction Control/Brakes/Disc Brake System/Brake Pad/Service and Repair.
3. Inspect the disc surface for cracks, and rust. Clean the disc thoroughly and remove all rust.
4. Use lug nuts and suitable plain washers to hold the disc securely against the hub, then mount a dial indicator as shown and measure the runout at 0.4 in (10 mm) from the outer edge of the disc.
Brake Disc Runout:
Service Limit: 0.004 in (0.10 mm)

5. If the disc is beyond the service limit, refinish the rotor with an on-car brake lathe. The Kwik-Lathe produced by Kwik-Way Manufacturing Co. and the "Front Brake Disc Lathe" offered by Snap-on Tools Co. are approved for this operation.
Max. Refinishing Limit: 0.83 in (21.0 mm)

NOTE: A new disc should be refinished if its runout is greater than 0.004 in (0.10 mm).