Measure the lateral run out

Fig 1: Test Gauge Point Against Brake Disc

Courtesy of VOLVO CARS OF NORTH AMERICA.

Put the test gauge point against the brake disc as shown in the illustration.

Rotate the brake disc.

Note the test gauge run-out. Brake disc lateral run-out must not exceed 0.050 mm.

If lateral run-out exceeds the value, replace the brake disc.

To replace brake discs, see: Brake disc rear, replacing .