Installing Front Wheel Bearing Housing

Information 

• Protect electric line as required when installing the spring strut on vehicles with PASM. 
• Do not lift/transport the spring strut/vibration damper at the electric lines. 
• A second mechanic is needed in order to install the spring strut/wheel bearing housing. 
• Make sure that the retaining pins do not damage the paint surface when fitting the spring strut mount. (Seal damaged areas with suitable preservative). 
• Observe specified tightening torques and torque angle. 

  > 4X00IN TIGHTENING TORQUES FOR FRONT AXLE .

• Always replace lock nuts. 

1. Position spring strut in the clamped connection in the wheel bearing housing.

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   Spring strut seat in wheel bearing housing

   1. 1.1 Push in spring strut with the lowered contact surface as far as it will go -Arrow/line-  .
2. Fix clamped connection for spring strut/wheel bearing housing at the bottom.

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   Spring strut clamp in wheel bearing housing

   1. 2.1 Fit screw -3-  .
3. Position spring strut/wheel bearing housing with the help of another person and secure it to the body (observe markings on removal).

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   Front spring strut to body

   1. 3.1 Fit and tighten collar nuts -1-  .

      > Tightening torque 33 N.m (24.3 ft lb.) 

4. Secure lower trailing arm -5-  to the wheel bearing housing.

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   Mounting for lower trailing arm

   1. 4.1 Tighten screw. -2- 

      > Tightening torque 120 N.m (89 ft lb.) 

   Information 

   Following installation, seal the threaded joint securing tie rod to wheel bearing housing with wax as shown in -Illustration-  . Use Pfinder AP14/4 for this (see PIWIS Parts Information - PET).

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   Applying wax on marked area (shown on threaded joint securing lower trailing arm)

5. Tighten hexagon nut securing tie-rod ball to wheel bearing housing -1-  .

   > Tightening torque 85 N.m (63 ft lb.) 

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   Tie rod to wheel carrier

   1. 5.1 When tightening the hexagon nut, counter at the ball joint threaded bolt -1-  using a special > 9546 - screwdriver  .

   Information 

   Only for GT4/GT4 RS/Spyder: 

   Fit connecting links (suspension/stabiliser) in the central position on the anti-roll bar.

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   Position of suspension/stabiliser on anti-roll bar

6. Secure spring strut in clamp on wheel bearing housing.

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   Spring strut clamp in wheel bearing housing

   1. 6.1 Fit threaded bolt for connecting link -1-  and tighten collar nut -2-  .

      Counter at the hexagon wrench face of the connecting link -Arrow-  when tightening the collar nut.

      > Tightening torque 85 N.m (62.7 ft lb.) 

   2. 6.2 Tighten screw on -3-  lower clamp.

      > Tightening torque 23 N.m (17 ft lb.) 

7. Install brake discs.

   Screw in and tighten screws -Arrows-  .

   > Tightening torque 10 N.m (7.4 ft lb.) 

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   Brake disc screws

   Information 

   • Brake calliper screws can always be re-used if no damage can be identified. 
   • Replace damaged bolts. 
   • Observe different tightening specifications! 
8. Install rear brake calliper with line bracket.
   1. 8.1 Position the brake calliper with the holder, place the brake calliper bolts -Arrows-  and tighten them.

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      Brake calliper screws (shown as an example)

      1. 8.1.1 When re-using the screws:  > Tightening torque 85 N.m (62.7 ft lb.) 
      2. 8.1.2 New screws:  > Initial tightening 30 N.m (22.1 ft lb.)  > Final tightening + 75° 
   2. 8.2 Place bolts -3-  on the wheel bearing housing and tighten.

      > Tightening torque 10 N.m 

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      Bracket on wheel bearing housing

   3. 8.3 -1-  Connect and lock cable plug for rpm sensor.
   4. 8.4 -2-  Connect and lock cable plug for PASM.