Installing Front Spring Strut: Notes

Check the various parts visually before installation.

Use new lock nuts and brake calliper fastening screws.

Observe correct tightening torques → 4001TW TIGHTENING TORQUES FOR FRONT AXLE .

Tie-rod end taper must be free of grease.

Counter with a screwdriver 9546  when tightening the lock nuts on the toe control arm.

1. Before assembling the spring strut and wheel carrier/trailing arm, check the adjustment dimension -B-  (spring strut position in wheel carrier) and adjust it according to the required value if necessary. Use special tool hook wrench 9647  for this purpose.

   Required dimension -B-  = 196 mm (plus/minus 1.0 mm).

   Fig 1: Identifying Adjustment Dimensions On Spring Strut

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Insert spring strut as far as it will go into the wheel carrier. Tighten the new lock nuts (for screw and suspension/stabilizer) -arrows-  to the prescribed tightening torque → 4001TW TIGHTENING TORQUES FOR FRONT AXLE .
   Fig 2: Locating Spring Strut/Wheel Carrier/Trailing Arm Assembly Screws

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Fit the spring strut/wheel carrier/trailing arm assembly into the vehicle. Get a second person to help with this step.
   • Note the installation position of the spring strut mount.
   • -A-  = vehicle outer side/-B-  = vehicle inner side.
   • The damper piston rod is thereby shifted outwards.
   • The three unused bores in the spring strut mount are intended only for driving on racing circuits. The three fastening bolts (M8) are fitted in these holes in this case. This increases negative camber.
     1. Vehicle outer side
     2. Vehicle inner side
        Fig 3: Identifying Spring Strut Mount

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4. Align spring strut mount according to the relevant marking (position of the three collar nuts). Tighten the new lock nuts -arrows-  to the specified torque at this position.
   Fig 4: Locating Spring Strut Mount Lock Nuts

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5. Fit the trailing arm fastening screw -4-  . Tighten in vehicle position only! Vehicle position means: vehicle standing on the wheels or wheel suspension is raised to the relevant height with a universal lift.

   Fit tie-rod end on wheel carrier -2-  , diagonal arm on trailing arm (at correct position) -3-  and then fit control arm spoiler -1-  .

   Observe installation position of control arm mount on the diagonal arm -3-  . The diagonal arm must be fitted at the center bore on the trailing arm (see Fig 5 below).

   Fig 5: Identifying Trailing Arm Components

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.