911 Carrera (997) F6-3.6L (2006)
Perforation crack length is small (less than 5 mm)
Some perforation cracks are over 7 mm long.
Brake disc cannot be used (maximum permitted perforation crack length is 5 mm)!
Perforation crack length is too big (greater than 5 mm)
Brake disc with cracked friction plate rim -arrow-.
Friction plate rim damaged
Brake disc cannot be used!
Checking grey cast-iron brake discs - minimum thickness
Information
Normally, brake discs are used until the maximum wear dimension is reached. Only in a few exceptional cases is it advisable to skim the brake discs
(if there is deep scoring or corrosion of the friction surface). In this case only the disc brake dressing machines approved by Porsche AG are to be
used.
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Only as new brake discs may be reworked!
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Only rework the brake discs symmetrically, evenly from both sides!