Replacing Upper Control Arm At The Front

Information 

• The entire threaded parts of the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on the wheels, or the wheel suspension is raised with a universal vehicle lift. Dimension -X- , 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.

Steel suspension 

• The vehicle position is reached at the rear axle by pre-tensioning the steel spring using spring clamp 9823 to the dimension -X-  .

Air suspension 

• Vehicle position can be obtained on the rear axle by using PIWIS Tester II 9818 to bleed the relevant air spring and carefully raise the relevant wheel bearing housing until dimension -X- is reached. 

  → 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM

• Use an intermediate layer (hard rubber)! Do not damage the brake cover plate. 
  Fig 2: Raising Wheel Carrier (Air Suspension) With Brake Disc And Calliper Fitted

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
• Screws and nuts are Geomet-coated and must not be greased. 
• Grease the toothing of the drive shaft slightly with aluminum paste Optimoly TA. 
• Drive shafts must not be left hanging from the joint stop! Tie up. 
• Use new screws and lock nuts. 
• Observe correct tightening torques and torque angles →  4X00IN TIGHTENING TORQUES FOR REAR AXLE  . 
  Fig 3: Identifying Upper Control Arm (At Front)

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
  Fig 4: Installation Position Of Upper Front Control Arm (Rear Axle Removed)

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Remove level sensor holder from the chassis subframe. → 431955 REPLACING REAR LEVEL SENSOR
2. Remove control arm on the chassis subframe and at the wheel carrier.
3. Installation is performed in reverse order.