Note: All models have internally cooled air-cooled brake discs at the front axle. TURNIER and 2.9L 24-valve models have internally cooled air-cooled brake discs at the rear axle, while other models have solid discs at the rear.
Mark the position of the wheels on the hubs.
This will allow the balanced wheel to be reinstalled in its original position. Mark with chalk or paint, drawing a line through the rim and hub.
When loosening the wheel nuts, the car must stand on its wheels. Raise the car on jack stands and remove the wheels.
Measure the thickness of the brake disc. At the service station, a special caliper or a micrometer with a bracket is used for this, since a flange forms on the brake disc during operation. The thickness of the brake disc can also be measured with a regular caliper, but then a hard gasket (for example, 2 10-pfennig coins) must be placed on each side of the disc. To obtain the thickness of the brake disc, the thickness of the placed gaskets must be subtracted from the measured size.
Note: Measure at eight points at 45° (1/8 of a circle) around the circumference of the brake disc.
Brake disc sizes see p. 121.
If the wear limit is reached, replace the brake discs.
If there are large cracks or grooves deeper than 0.5 mm, replace the brake discs.
If you have a linear movement indicator, you can measure the lateral runout of the brake disc without removing it. Mount the indicator as close as possible to the outer diameter of the disc. The prescribed value: lateral runout should not exceed 0.1 mm. A more significant lateral runout may be caused by a broken front wheel bearing. For a more accurate check, contact a FORD service station.
Place the wheels so that the marks applied before removal match. Tighten the wheels with nuts. Lower the car and tighten the wheel nuts crosswise to 100 Nm.