Air-Spring Strut

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Before loosening the air lines in the installed state, check if the rolling boot is still filled with the residual pressure of approx. 3 bar. To do this, press on the rolling boot of the air spring with your thumb. The rolling boot must give perceptible resistance. If no significant resistance can be felt, the air spring is depressurised and must be replaced along with the residual pressure retaining valve.

Fig 1: Checking Air Bellows
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

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 right before installation.
- Only use lubricants that have part numbers.
- Carefully cover open components or close them if the repair work will not be carried out immediately.
- Do not use an impact bolter.
- Observe correct tightening torques. → WM 4300TW TIGHTENING TORQUES