On the vehicles mentioned above, bubbling and/or gurgling noises can occur at idle speed.
This may be due to condensation which accumulates in the ventilation hose of the charcoal filter tank. When fresh air is drawn in during operation, the noises described above can occur.
To eliminate this problem, the front right-hand wheel arch liner should be removed. The ventilation hose, which goes from the activated charcoal tank to the vehicle floor and out into the open, is now visible. At the point where the hose curves upward, a 3 mm hole should be drilled in the hose at the lowest point of the curve. This will allow the water to drain downward.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
The reprinting, distribution, reproduction, exploitation in any form and disclosure of the contents of this document, even in part, is prohibited without our express written approval and indication of the source. The schematic illustrations, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.