911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
Brake Rotor/Disc: Service and Repair
Front Brake Disc Replacement
Removing and Installing Front Brake Disc
Removal
1. Take off front wheel.
2. Separate brake pipe from brake hose at the spring strut and remove brake caliper. First press down brake pedal with pedal holder to prevent brake
fluid from escaping from the reservoir.
Cover or plug brake hose and brake pipe (to avoid dirt ingress). Remove retaining spring from brake hose.
3. Take off brake disc after undoing the countersunk head screw(s). If a stiff brake disc cannot be released even by applying light blows with a plastic
hammer, screw hexagon head bolts simultaneously into the M8 threads of the brake disc and press off brake disc.
Important Note
The front brake discs of the 911 Turbo are a two-part assembly.
Brake disc No.1 is bolted to the ring (cup) No.2 with 10 bolts No.3 (M 6). Only the complete brake disc assembly (disc with ring) is available as a
spare part.
Important: Do not separate brake disc holder and brake disc. Furthermore, turning the screws no.3 (even if they seem to be loose) is neither
permitted nor required [for explanation about Tightening, Play (A), and Gap (S) refer to Explanation Pertaining to Two-Piece Brake Disc.]
Explanation Pertaining to Two-Piece Brake Disc
The brake disc coming in two pieces for reasons of noise suppression is the result of further development and optimization. The play between the
brake disc flange and the contact surface of the screw head may be 0 - max. 0.1 mm depending on the tolerances. (dimension A in figure).
In spite of a correct tightening torque (8 Nm/ 6 ftlb.) it may occur that the screw including the bushing can be turned by a few angular degrees. The
angle results from the gap "S" between bushing and brake disc holder which is subject to tolerances. This may lead to the misinterpretation of a
"loose screw". However, pinching prevents the screw from turning in the bushing.