Audi A4 - Indefinable noises | HELLA

Audi

A4 (8D, B5)

Model year: up to 1999

Engine: 1.6i (AHL)

Indefinable noises

Accumulation of condensation

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 note Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only. Reprinting, distribution, reproduction, exploitation in any form or 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, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.

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