Checking Rear Pscb Brake Discs/Wheel Hubs - Lateral Runout

Secure the adapter plate.

1.2 > 9510/1 - Adapter plate must be tightened to > Tightening torque 160 Nm (118 ftlb.) . > Adapter plate on wheel hub

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Adapter plate on wheel hub

Check lateral runout of brake discs.

2.1 > VAS 6079/1 - Dial Gauge Holder for Brake Discs must be fitted at a suitable position on the wheel bearing housing. > Dial gauge on brake disc

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Dial gauge on brake disc

2.2 Fit > VAS 6079 - Dial gauge with slight pretension and measure the lateral runout at the greatest external diameter of the brake disc.
2.3 If the lateral runout of the brake discs is greater than > Measured value 0.06 mm , check lateral runout of the wheel hubs See below
Information

The front face of the wheel hub must not be corroded and must be cleaned if necessary using a polishing cloth.

Check lateral runout of wheel hubs.

3.2 > VAS 6079/1 - Dial Gauge Holder for Brake Discs must be fitted at a suitable position on the wheel bearing housing.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Dial gauge on wheel hub

3.3 > VAS 6079 - Dial gauge must be fitted with slight preload. Always measure both the external and internal diameter of the front face of the wheel hub.
3.4 If the lateral runout of the wheel hubs is greater than > Measured value 0.03 mm , replace the wheel hub. Otherwise, replace the rear brake disc.