FRONT BRAKE (DISC) RUNOUT INSPECTION

Caution

• The brake disc runout specification must be met to assure of correct brake performance without complaints of roughness from the customer.

• Do not install a disc plate that is less than the minimum thickness specified. Do not machine a disc plate below the minimum thickness specification.

Note

• When installing disc plates, always align the alignment mark on the disc plate with those on the wheel hub.

• When installing disc plates, always apply silicone sealant TB1107.

1. Tighten the wheel nut to the specified torque. (See WHEEL AND TIRE REMOVAL/INSTALLATION.)

2. Lift up the vehicle.

3. Install the special tool, using the spherical tip extension.

4. Locate an opening on the inboard side of the dust cover that will allow the dial gauge tip to be positioned between 5-15 mm {0.20-0.59 in} from the outer edge of the disc plate.

5. Clamp the special tool on the vehicle, making sure the flexible indicator arm and probe tip do not touch the dust cover or tire while rotating.

Note

• Do not clamp the gauge set to a vehicle component separated from the disc plate by a flexible joint, such as a ball joint or body mount.

6. Rotate the wheel for 6 revolutions and record the total indicated runout.

7. If the total runout exceeds the specification, remove the disc plate. (See DISC PLATE REMOVAL/INSTALLATION.)

8. Clean the disc plate installation surface of dirt, rust and foreign material.

9. Measure and record the wheel hub runout.

10. If the total runout exceeds the specification, replace the wheel hub and inspect the runout again. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.)

11. If the total runout is still out of specification, measure and record the thickness of the brake disc. If the thickness is sufficient to machine the disc plate to the runout specification, go to Step 12. If the thickness is not sufficient, replace the brake disc with a new one and inspect the total runout again.

12. Using the special tool, machine the disc plate if the final thickness will not be less than the minimum specification. Inspect the total runout again.

Note

• Disc plate machining must be done with an on-vehicle lathe. Follow the lathe manufacturer instructions.