Installing rear wheel bearing housing

→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

Information 

• All screws and threaded joints on the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on its wheels, or the wheel suspension is raised with a universal vehicle lift. Dimension -1-  , from lower edge of wing to center of axle corresponds to vehicle position. The current height can be found in →  4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT  . Always observe the following points! 

  Dimension 1 - center of wheel to lower edge of wing (rear axle shown) 

• Screws and nuts are Geomet-coated and must not be greased  .

1. If the wheel bearing housing was replaced, perform the following tasks: 
   1. 1.1. Clamp the wheel bearing housing in a vice with aluminum protective jaws.
   2. 1.2. Insert wheel bearing unit into the wheel bearing housing and tighten fastening screws.
      Fig 1: Wheel Bearing Unit Screws Tightening Sequence

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.

      Tightening sequence for wheel bearing unit 

      1. 1.2.1. Always observe the specified tightening sequence -1 - 4-  !

         Observe specified tightening torques:

         Wheel bearing unit to wheel bearing housing: Initial tightening 80 Nm (59 ftlb.) Final tightening +90° 

         Information 

         • The speed sensor must be inserted using Optitemp (Optitemp LG2, 25-ml spray can available under Part No. 000.043.204.21)  .
         • The bore for mounting the speed sensor must be free of dirt  .
         • Observe correct tightening torques  .
      2. 1.3. Insert speed sensor -2-  and tighten fastening screw -1-. Tightening torque 8 Nm (6 ftlb.) 

         Mounting for speed sensor 

      3. 1.4. Position cover plate for brake disc -2-  and tighten fastening screws -1-  . Tightening torque 10 Nm (7.5 ftlb.) 

         Mounting for brake cover plate (shown installed as an example) 

2. Installation is performed in reverse order.

   Observe specified tightening torques:

   Information 

   Tighten the threaded joint on the wheel bearing housing only at the fastening screw -1-  . Counter at the nut -3-  while doing so.

   Mounting for trailing arm on wheel bearing housing 

   Lower trailing arm to wheel bearing housing: Initial tightening 120 Nm (89 ftlb.) Final tightening +360° 

   Shock absorber to wheel bearing housing: Initial tightening 150 Nm (111 ftlb.) Final tightening +180° 

   Tie rod to wheel bearing housing: Initial tightening 90 Nm (67 ftlb.) Final tightening +90° 

   Upper control arm to wheel bearing housing: Tightening torque 95 Nm (70 ftlb.) 

   Drive shaft to wheel hub (Step 1: Wheels suspended in mid-air, operate brake while tightening): Initial tightening 200 Nm (148 ftlb.) 

   Drive shaft to wheel hub (Step 2: Wheels on the ground): Final tightening 180°