Audi Q7: Plenum Chamber Water Drain, Removing and Installing
Removing
- Turn off the ignition.
- Remove the plenum chamber cover -A-.
Refer to
→ Body Interior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
- Depending on the engine and the vehicle version, if
necessary loosen the lower plenum chamber bulkhead
-D- from the vehicle and pivot it
completely to the side (do not open the coolant circuit). Refer
to
→ Body Exterior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
Note
- The water drains -B- are
snapped into the opening of the plenum chamber from below.
- Depending on the engine and the vehicle version the water
drains -B- on the installed lower
plenum chamber bulkhead -D- is not
accessible.
- Remove the water drains -B-
downward from the openings of the plenum chamber.
Installing
Installation is done is reverse order, observe the
following:
- Check the valves -C- of the
water drains -B- these must not
stick and must completely open.
- Check the plenum chamber -A-
for debris and clean if necessary.
- Install the water drains -B-
downward in the openings of the plenum chamber.
- Reinstall removed components in the reverse order and
reattach detached components.
Plenum Chamber Water Drain, Checking
Procedure
- Remove the plenum chamber cover -A-.
Refer to
→ Body Interior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
Note
- To prevent water from running via intake shaft
-B- into the heater and A/C unit
when plenum chamber cover -A- is
installed, plenum chamber cover -A-
must not be damaged. In addition the plenum chamber cover
-A- must be correctly and
completely engaged in the windshield frame
-C-.
- The draining of water from plenum chamber
-A- may be impaired by deposits
(leaves, various tree needles, etc.) accumulating in the water
drains -B- of the plenum chamber
-A-. The water level in plenum
chamber -A- then rises if the
vehicle is taken to an automatic car wash or in the event of
heavy rain. Water enters via the intake shaft into the heater
and A/C unit and is blown by the Fresh Air Blower -V2- together
with the conveyed air into the dust and pollen filter and onto
the evaporator.
- If valves -C- of the water
drains -B- (right and left in
plenum chamber) are blocked by leaves and pine needles, it may
cause the drains to freeze up in winter and water can no longer
drain out. After a short drive, heat emitted from engine and
exhaust system melts the ice in the drains again and water may
drain off again before vehicle arrives at the workshop.
- The water drains -B- are
snapped into the opening of the plenum chamber from below. Refer
to
→ Chapter "Plenum Chamber Water Drain, Removing and Installing"
for removing and installing.
Plenum Chamber Water Drain, Cleaning
Procedure
- Turn off the ignition.
- Remove the plenum chamber cover -A-.
Refer to
→ Body Interior; Rep. Gr.50; Bulkhead; Plenum Chamber Cover,
Removing and Installing.
- Clean debris (leaves, pine tree needles) and other
contamination out of plenum channel -A-.
Note
- To check the water drains -B-
that are difficult to reach, use a commercially available and
illuminated endoscope, for example. It is best to use one that
has a flexible waterproof head.
- Use a commercially available flexible gripping tool to
clean, for example coarse dirt from difficult to reach water
drains -B-. Then clean the
remaining dirt through the valves -C-.
- Check the valves -C- of the
water drains -B- for proper
functioning (valves -C- must not
stick or be obstructed by dirt).
READ NEXT:
Notes for Incorporating the Heating and A/C System in the Coolant
Circuit
Note
In vehicles with a diesel engine with and without a "parking
heater", an Auxiliary Heater Control Module -J60
Note
The Coolant Recirculation Pump -V50- is currently not
installed in all vehicles. Refer to
→ Rep. Gr.19; Coolant System/Coolant; Connection Diagram -
Coolant Hoses. If a p
SEE MORE:
- Turn off the ignition.
- Discharge the refrigerant circuit. Refer to
→ Refrigerant R134a Servicing; Rep. Gr.87; Refrigerant Circuit.
- Remove the front heater and A/C unit. Refer to
→ Chapter "Heater and A/C Unit, Removing and Installing".
Removing
- Rem
Overview - Front Brake Caliper
1 - Brake Caliper
2 - Gasket
Cannot be replaced separately at this time
3 - Brake Caliper Piston
4 - Protective Cap
Quantity: 6
Refer to
→ Chapter "Dust Cap, Removing and Installing"
Pull onto the brake caliper pi