WM, 433037 Disassembling And Assembling Front Spring Strut (Air Springs): Information: Overview

Information

As of a mileage of 200, 000 km (125, 000 miles), it is recommended that the air springs be replaced on both sides of the axle if there is damage to one air spring.
If the vibration dampers are leaking, replace the complete air-spring strut. The oil from the vibration damper can damage the convoluted air bellows.
When depressurized, the air spring must not be twisted. There is a danger that the convoluted air bellows inside the air spring will be damaged by bending or folding, thereby significantly reducing its service life.

Component overview

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Air-spring strut, complete, FA

Fig 1: Exploded View Of Air-Spring Strut, FA

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Exploded view of air-spring strut, FA

No.	Designation	Note
1	Hexagon nut	Please use new lock nuts.
2	Ring
3	Countersunk-head screw
4	Grommet
5	Cover	Refer to the Spare Parts Information for details of allocation.
6	Hexagon nut	Please use a new lock nut.
7	Shock absorber mounting	Refer to the Spare Parts Information for details of allocation.
8	Ring, small (O-ring)	Please use a new seal.
9	Push-on connector
10	Pressure control valve
11	Sealing ring	Please use a new sealing ring.
12	Air spring
13	Boot/bellows	Please use a new boot/bellows.
14	Ring, large (O-ring)	Please use a new seal.
15	Shock absorber Safety catch	Refer to the Spare Parts Information for details of allocation. Always replace safety catch (shown fitted on shock absorber!)
16	Connector with grommet

Fig 2: Spring Strut Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Spring strut, cut-out view

1	Grommet
2	Cover
3	Hexagon nut
4	Shock absorber mounting
5	Ring, small (O-ring)
6	Air spring
7	Additional spring
8	Retainer
9	Outer guide
10	Air-spring bellows
11	Rolling piston
12	Boot/bellows
13	Shock absorber
14	Ring, large (O-ring)

Notice

Information

Recommendation for workshops replacing shock absorbers/spring dampers:

Dampers can be replaced separately up to a mileage of 30, 000 km or 3 years.
If the mileage is > 30, 000 km or the components are more than 3 years old, we recommend replacing them in pairs.

The greatest possible care and cleanliness, as well as perfect tools are important requirements for carrying out perfect repairs on air-spring struts. The general and basic rules of safety apply. These are specifically listed here again for repairing air-spring struts.

Thoroughly clean the connection points and their surroundings before loosening them.

Do not use fibre-shedding cloths.

Do not take spare parts out of the packaging until just before installation.

Only use lubricants that have part numbers.

Carefully cover open components or close them if repair work will not be carried out immediately.

Do not use an impact bolter.

Observe correct tightening torques.

> 4X00IN TIGHTENING TORQUES FOR LEVELLING SYSTEM/PORSCHE DYNAMIC CHASSIS CONTROL (PDCC)