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– If no dirt was found: Pour a small amount of water into plenum
chamber above engine cover panel (right-side) -arrow- and
check that water drains quickly and fully.
If necessary, clean plenum chamber and water drains
⇒ page 102 .
Step 2 - checking plenum chamber and water drains (driver's
side):
– Use a hand-held light to check for dirt in plenum chamber and
water drains.
– If no dirt was found: Pour a small amount of water into plenum
chamber between brake fluid reservoir and coolant expansion
tank -arrow- and check that water drains quickly and fully.
– If necessary, clean plenum chamber and water drains
⇒ page 102 .
Install in reverse sequence.
Note
If the water you have poured in does not drain out or drains out
very slowly, this is a sign that the water drains -arrows- are fully
or partly blocked.
3.49.2 Cleaning plenum chamber and water
drains
Special tools and workshop equipment required
♦ Suction feed spray-gun - VAG 1538-
♦ Nylon probe - VAG 1538/2-
♦ Flexible picking tool
Cleaning the plenum chamber, as well as the removal procedures
required, are a repair measure and should be charged separately.
Procedure:
– Remove coarse dirt from plenum chamber and water drain
grommets with a flexible picking tool.
– Remove fine dirt using suction-feed spray gun - V.A.G 1538-
and nylon probe - V.A.G 1538/2- or a thin water hose.
3.50 Snow screen: cleaning
Steps for removal:
– Remove front bumper ⇒ Rep. gr. 63 ; Bumper (front); Re‐
moving and installing bumper .
Audi A8 2003 ➤
Maintenance - Edition 06.2014
102 3. Maintenance
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