Checking Front Brake Discs/Wheel Hubs - Lateral Runout

1. 1.1  Remove wheel.

   > 440519 REMOVING AND INSTALLING WHEEL

2. 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

1. 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. 2.2  Fit > VAS 6079 - Dial gauge  with slight pretension and measure the lateral runout at the greatest external diameter of the brake disc.
3. 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.

1. 3.1  Remove front brake disc.
2. 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. 3.3  > 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.
4. 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 front brake disc.