911 Carrera 4S (997) F6-3.8L (2007)
Central wear area
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Measuring brake disc thickness
Information
Unlike smooth brake discs, on which the minimum thickness is measured in the middle of the disc, the minimum thickness of perforated (cross-drilled)
brake discs must always be measured on the inner and outer friction surface track that is most worn -arrows-.
Wear areas A and B
-A- Central wear area
-B- Outer and inner wear area
Measure the brake disc thickness -X- in the area of the outer or inner friction surface track -arrows-, at a minimum of 3 different points (-A, B, C-)
offset by 120°.
To do this, use a suitable micrometer or a brake disc gauge.
Measurement points for brake disc thickness
Bedding in the brake pads and brake discs
New brake pads require a bedding-in period of approx. 200 km (124 miles)! Only then do they achieve their best friction and wear coefficient. During
this period, the brakes should be subjected to full stress when traveling at high speed only in emergencies. The slightly reduced braking effect must be