Installing Wheel Bearing Housing

→ Wear personal protective gear.

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

1. Fit wheel bearing housing with drive shaft on the lower trailing arm (second mechanic required!).

   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! 
     Fig 1: Identifying Dimension 1 - Centre Of Wheel To Lower Edge Of Wing (Front Axle)

     Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   • On vehicles with air springs, the respective air spring must be bled using the Porsche System Tester. → 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM
   • Vehicle position can be set by carefully raising the relevant wheel bearing housing. 
   • Use an intermediate layer (hard rubber)! Do not damage the brake cover plate. 
     Fig 2: Lifting Wheel Carrier (Example Without Wheel And Brake Disc)

     Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   • Screws and nuts are Geomet-coated and must not be greased. 
   • Grease the splines of the drive shaft slightly with aluminum paste Optimoly TA. 
   • Drive shafts must not be left hanging from the joint stop! Tie them up. 

   Installation is performed in reverse order.

   Lower trailing arm to wheel bearing housing:

   Upper trailing arm to wheel bearing housing:

   Tie rod to wheel bearing housing:

   Spring strut to lower trailing arm:

   Drive shaft to differential:

   Air guide to lower trailing arm:

   Brake disc to wheel hub:

   Brake calliper to wheel bearing housing:

   Cable holder to wheel bearing housing: