Installing 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! 
  Fig 1: Checking Dimension Between Centre Of Wheel To Lower Edge Of Wing

  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: Example Of Lifting Wheel Carrier 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. 

Information 

Before installing the drive shaft, replace the lock ring (circlip) on the shaft as well as the shaft sealing ring in the final drive → Installing Rear Final Drive .

Make sure not to damage the sealing ring when guiding the shaft into the final drive.

• The inner end of the drive shaft must be held with both hands at the joint and inserted into the rear axle differential with a quick jerk. The outer joint must be held by a second mechanic in order to prevent damage. 
• Check that the joint is seated correctly in the rear axle differential: Hold the joint with both hands and pull outwards. 
• Visually check that the plastic protective rings are flush on the rear axle differential. 

Installation is performed in reverse order to removal.

Lower trailing arm to wheel bearing housing: Tightening torque 90 Nm (67 ftlb.) +120° 

Upper trailing arm (front and rear) to wheel bearing housing: Tightening torque 50 Nm (37 ftlb.) +60° 

Tie rod to wheel bearing housing: Tightening torque 50 Nm (37 ftlb.) +60° 

Cable holder to wheel bearing housing: Tightening torque 10 Nm (7.5 ftlb.)