911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
Brake Rotor/Disc: Testing and Inspection
Rear
Lateral Runout
1. Measuring requirements: No tilt play of the wheel.
2. Fit adapter plate (Special Tool 951011) to wheel hub. Tightening torque of wheel nuts (mounting nuts) is 130 Nm.
3. Engage dial gauge holder, e.g. Ate Part No. 03.9314-5500.3101, into the brake caliper, center out and attach by turning the wing screw.
Retract brake pads somewhat if the brake disc cannot be rotated freely.
Do not damage lug for cross spring on the retaining plate of the four-piston fixed calipers when fitting the dial gauge holder.
NOTE:If required, fit dial gauge holder with Ate conversion kit, Part No. 03.9314-5510.3/01 (longer wing screw and bracket for dial gauge if
necessary).
4. Fit dial gauge with a slight preload. Place measuring pointer on largest diameter of brake surface outside of perforation.
5. Rotate brake disc and read off runout on dial gauge.
Max. permissible lateral runout of fitted brake disc: 0.09 mm.
Lateral runout of removed brake disc: max. 0.05 mm.
Lateral runout of wheel hub: max. 0.04 mm.
6. If the lateral runout of the brake disc exceeds 0.09 mm, remove the brake disc and check lateral runout of wheel hub. Before dismantling, mark
position of disc on wheel hub.
7. Check runout of wheel hub as follows:
