The front valves of back pressure (gearboxes) rot and start to lose an air. It must be replaced or try to clean. First, air suspension line (tube) is removed, the valve around is cleared of oxides. Then the tube is installed again and checked for leaks. If after cleaning the valve does not break, and the system doesn’t lose air, then all is well. Otherwise, the valve needs to be replaced.
It is necessary to dismantle the air spring, remove the old dust cover, put a new one and install the air spring in place.
Usually, 12.5 atmospheres of air or nitrogen are pumped into the system, depending on how the sensor is configured in the car. In the old models of the VW Touareg, nitrogen is not pumped, their air suspension system is not designed to use nitrogen. But in the new VW TouaregNF models from 2010, nitrogen is pumped in, as it is provided by the plant. It is pumped according to the standard value of pressure in the air suspension system – an average of 12.5 atm (12-13 atm).
Air suspension is a shock absorber with a pneumatic baloon installed on it (instead of a spring) and performs the function of maintaining a certain level of the vehicle body relative to the roadway. This is made possible by changing the pressure in the air suspension.
A shock absorber is a device used to dampen vibrations, as well to absorb shocks and hits of moving parts (wheels and suspension), and the vehicle body itself.
A back pressure valve is usually installed on closed-type air suspension supports in case of a broken pneumatic line (pipe) or any other leakage so that all air does not come out of the air suspension cylinder. Otherwise, all the air will come out, and the rubber sleeve will bend, and it will simply tear it off with the details of the air suspension itself.
But in this case, there will be 5-6 atmospheres of air in the air suspension, and it will work in the normal mode. The pillow will still get on the bump stops, but the sleeve will be filled with air, so it will not tear. But if leakwill happen in the cylinder, the valve will not save. Although, in practise happened that the valves on the front cylinders of the Tuareg fell off, the air suspension was chewed, but whole, without a break.
Most often, after 100,000 kilometers distance, shock absorbers are beginning to pound. All other components of the air suspension can last up to 250,000 kilometers distance.
Outside, under the front right passenger seat in the doorway, there is a special plastic protection, after removing it, you can get access to the air suspension compressor on Porsche Cayenne.
There is a relay block behind the protective panel under the steering wheel, on which the VW Touareg NF air suspension compressor relay is installed.
Outside, under the front right passenger seat in the doorway there is a special plastic protection, after removing it, you can get access to the compressor of air suspension in VW Touareg NF.
Outside, under the front right passenger seat in the doorway there is a special plastic protection, after removing it, you can get access to the compressor of air suspension in VW Touareg.