Installing Upper Control Arm At The Front

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. Measurement -1- from the lower edge of the wing to the middle of the vehicle axle corresponds to vehicle position. The current height values can be found in →  4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT  . Always observe the following points!
  Fig 1: Checking Dimension 1 - Centre Of Wheel To Lower Edge Of Wing (Rear 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
• Screws and nuts are Geomet-coated and must not be greased  .

1. Fit threaded joint -2-  for the front control arm at the wheel bearing housing. Tightening torque 150 Nm (111 ftlb.) +90 angular degrees 
   Fig 2: Identifying Threaded Joint For Upper Trailing Arm (Outer)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Fit threaded joint -2-  for the front control arm on the chassis subframe. Tightening torque 90 Nm (67 ftlb.) +90 angular degrees 
   Fig 3: Identifying Threaded Joint For Upper Trailing Arm (Inner)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Fit rear level sensor on the upper trailing arm at the front → 431955 REPLACING REAR LEVEL SENSOR .