VW Passat & Audi A4 1990-2000

Plenum Chamber and Water Drain Valve

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The plenum chamber is the rearmost area under the hood. If this area is not kept clean and the water drain valves cleared, an accumulation of water, leaves and other debris can become collected in this area. This area should be inspected and cleaned during routine maintenance and the water drain valves checked to make sure they allow proper drainage. If water accumulates in this area, the drain valves should be inspected and cleaned as necessary.



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Fig. The water drain valves are located beneath the battery and the brake master cylinder-A4 model shown

 
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