Examination
1. Mark with paint the position of the wheels relative to the hub. This will allow the balanced wheel to return to its original position. Loosen the wheel bolts with the vehicle on the ground. Raise the front of the car, put it on stands and remove the wheels.
The thickness of the brake disc should be measured at its thinnest point.
2. Measure the disc thickness. Service stations use a special gauge or micrometer for this, since a shoulder is formed during the wear of the disc. The disc thickness can be measured with a conventional caliper. To do this, it is necessary to put a lining of a certain thickness on each side of the disk (e.g. two coins). Then, from the value obtained as a result of the measurement, it is necessary to subtract the thickness of two coins. Attention: the measurement must be made at several points.
3. The dimensions of the brake disc are given in the Specifications.
4. If the thickness obtained is less than the minimum specified value, the brake disc must be replaced, refer to the relevant section.
5. If the brake discs have been machined to their minimum thickness, the brake pad set can be reinstalled.
6. If there are cracks or scuffs, the brake discs must be replaced.
7. Reinstall the wheels so that the markings made during removal match. Pre-lubricate with a thin layer of bearing grease the centering belt of the wheel disk on the hub. Do not grease wheel bolts. Replace rusty bolts. Wrap bolts. Lower the vehicle onto the wheels and tighten the bolts crosswise to 100 Nm.