Note: The gravity valve is installed behind the rear bumper on the right side. For clarity, the operation is shown with the bumper removed.
Removing
1. We prepare the car for work (see "Preparing the car for maintenance and repair").
2. Using a Phillips screwdriver, loosen the clamp that secures the plastic tube of the gravity valve and disconnect the tube from the valve.
Tip: At low ambient temperatures, it is difficult to remove the ends of the pipes from the valve nozzles. Therefore, before disconnecting the tubes, warm them up (pour boiling water or gently heat with a hair dryer).
3. Key by 10 mm unscrew the two nuts securing the valve.
4. Remove the valve.
5. Use a Phillips screwdriver to loosen the clamp that secures the plastic tube of the gravity valve and disconnect the tube from the valve.
Installation
Install the valve in reverse order.