PCCB Brake Disc Wear Appearance

Friction surfaces after normal brake load while driving on roads.
No surface fractures present -

No replacement necessary!

Fig 1: Identifying Bores (Perforations) In Brake Disc Friction Surface
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Friction surfaces after a long run and occasional higher load. Isolated cases of connected surface fractures less than 1 cm²-arrow- .
No replacement necessary as the associated surface fractures are < 1 cm² !

Fig 2: Locating PCCB Surface Fractures
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
End of service life of friction surface or after highest load on a racing circuit.
Replace brake discs if the connected friction surface damage is > 1 cm²-arrow- . To do this, follow the instructions provided under → 465102 CHECKING FRONT PCCB BRAKE DISC (WEAR ASSESSMENT) .

Fig 3: Locating Associated Surface Fracture
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

The best way to detect a surface fracture is by checking the wear indicators. Based on the wear indicators, this means that at least one wear indicator -arrow- must have a surface fracture of > 50% (damage > 1 cm² /entire surface of a wear indicator with a surface area of approx. 2 cm² ).

Fig 4: Locating PCCB Surface Burnout On Wear Indicator
Courtesy of PORSCHE CARS NORTH AMERICA, INC.