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. 

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

1. Tighten clamped connection between spring strut and wheel bearing housing.

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   Spring strut to wheel bearing housing

   1. 1.1 Tighten -3-  screw > Tightening torque 23 N.m (17 ft lb.)  .
2. Guide spring strut/wheel bearing housing into the wheel housing and fit it on the body (observe markings). Get another person to help you with this.
   Fig 1: Spring-Strut Mount Nuts Tightening Sequence

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   Installation position of spring strut mount

   1. 2.1 Tighten -1 to 3-  collar nuts > Tightening torque 33 N.m (24.3 ft lb.)  .
3. Fit lower trailing arm -5-  at the wheel carrier.

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   Mounting for lower trailing arm

   1. 3.1 Tighten -2-  screw > Tightening torque 120 N.m (89 ft lb.)  .
   2. 3.2 Fit level sensor linkage at the holder -1-  .
   1. 3.2.1 Tighten nut and counter at the square part of the ball joint while doing this. > Tightening torque 10 N.m (7.5 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)

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

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

   When tightening the lock nuts, counter at the ball-joint pins using special tool > 9546 - screwdriver  (Torx screwdriver).

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   Securing tie-rod ball to wheel carrier

5. Fit connecting link -1-  on the wheel bearing housing.

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   Spring strut to wheel bearing housing

   1. 5.1 Insert connecting link -1-  and tighten collar nut -2-  > Tightening torque 85 N.m (62.7 ft lb.)  .

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

6. Prepare for installing the brake disc.
   1. 6.1 Check that all parts are in perfect condition (visual inspection) and replace them if necessary.
   2. 6.2 Clean the flat and centering surfaces on the brake disc and wheel hub.
   3. 6.3 Apply a very thin coat of Optimoly TA (aluminum paste) to the centering surface on the wheel hub.
7. Tighten screws -Arrows-  on the brake disc > Tightening torque 5 N.m (3.7 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 front brake calliper with line bracket.

1. 8.1 Fit brake calliper together with the holder and fit and tighten new brake calliper screws -Arrows-  .

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   Brake calliper screws (shown as an example)

   1. 8.1.1 Re-use 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 Screw in and tighten screws -3-  securing bracket to wheel carrier. > Tightening torque 10 N.m 

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   Bracket on wheel carrier

3. 8.3 Connect and lock electric plug connection for generator -1-  .
4. 8.4 Connect and lock electric plug connection PASM -2-  .