Checking Brake Discs For Edge Damage

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Information

Irrespective of wear, a brake disc change may be necessary due to edge damage on the brake disc friction surfaces .
In such cases, only one brake disc may need to be replaced if the friction surface of the other PCCB brake disc is still perfectly OK .

Fig 1: Checking PCCB Brake Disc Edge Damage
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Max. permissible width/depth = 2 mm
Max. permitted length = 10 mm
Max. 3 damaged edge areas permissible