Removing and Installing Rear Spring Strut (Air Spring

Removing and installing rear spring strut (air spring)
Removal

Caution! Danger of injury and material damage if the wheel carrier is raised incorrectly.
^ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels). When raising, use a suitable intermediate layer (hard rubber).
^ Do not damage the brake cover plate.

The relevant wheel must be removed when carrying out repairs in order to avoid damaging the drive shaft.





1. To bleed the air suspension (air pressure must be allowed to escape out of system), use the -Porsche System Tester-. To do this, select the menu item Bleed air suspension in the Air suspension system.
2. Lift vehicle.
3. Fit protective tube on drive shaft (shop-made, to protect the drive shaft).





4. Undo pressure pipe on the residual pressure restraint valve (front spring strut connection in figure). Then, unclip the pressure pipe from the holders and set it aside.





5. Remove stone shield on CDC sensor .





6. Disconnect-CDC sensor plug connection- and set the cable aside.





7. Remove the fastening screw for the connecting rod/spring strut on the wheel carrier. To do this, use a suitable -lift with rubber base- in order to prevent slipping. Lay the connecting rod aside.





8. Remove the -4 fastening screws (top, arrows)





9. Carefully remove -spring strut- -arrow downwards.

Installation

Caution! When filling the air spring struts, the vehicle lifts.
Danger of injury and material damage if the wheel carrier is raised incorrectly.
^ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels). When raising, use a suitable intermediate layer (hard rubber).
^ Do not damage the brake cover plate.

Note!
^ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels). When raising, use a suitable intermediate layer (hard rubber).
^ Do not damage the brake cover plate.
^ Visually inspect all parts.
^ If a new spring strut is fitted, it must be prebilled to 3 bar in its original packaging.
^ Replace self-locking nuts.
^ Replace all expansion screws (screws which are fitted with torque angle tightening procedure).





^ 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 using a universal vehicle lift. -Dimension X-, from lower edge of wing to middle of axle 506 mm ± 10 mm corresponds to vehicle position.





1. Insert spring strut into vehicle.





2. Screw on the -4 fastening screws (arrows)-.





3. Carefully raise the air-spring strut using a universal -lift with rubber base-. Then, pull the wheel carrier downwards in order to fit the fastening screw.





4. Attach the fastening screw for the -connecting rod/spring strut- on the wheel carrier.





5. Connect the -CDC sensor plug connection- to the lower part of the spring strut (arrow). Insert cable into the holders.





6. Fit -stone shield on CDC sensor (arrow)-.
7. Attach the pressure pipe on the residual pressure restraint valve using a suitable open-ended wrench. Then, clip the pressure pipe into the retaining devices.
8. Remove protective tube from drive shaft.
9. Fit rear wheel.





10. To fill the air suspension (the system must be filled with compressed air), use the -Porsche System Tester-. To do this, select the menu item Fill air suspension in the Air suspension system.