Coating On The PCCB Brake Discs (Potential Causes)

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The coating on the PCCB brake discs arises as a result of a high load and high temperatures, for example on a racing circuit. Check the following in such cases:

Fig 1: Identifying Brake Disc Friction Surface Bores (Perforations)

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Ventilation (brake cooling): All components are present, secured correctly and undamaged.
Brake pad quality: Use the appropriate brake pads if the vehicle is being used on a racing circuit.
The perforation bores -see Fig 1figure- in the brake discs must not be blocked. Clear them if necessary. To do this, observe the following note.
If there is a coating on the pads, the brake discs can still be used provided the wear criteria of the brake discs are OK.