1996 AUDI A4 Quattro Fuel Syst

20-61


Fig. 1 Bleed valve removing, installing, checking
- To remove, unclip valve from side of filler neck.
Lever in rest position: Valve closed Lever pressed in direction of arrow: Valve open
Pa
ge 9 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-62


Fuel filler neck, component overview
(vehicles with ORVR)

Vehicles with all wheel drive and 1.8 ltr. turbo or
2.8 ltr. engine
1 -
Expansion tank
- Secure wires to expansion tank using
adhesive tape
2 -
Bleed lines
To connector line at top of fuel tank
3 -
Tank protection valve Clipped to fuel filler neckVentilates fuel tank for pressure
compensation
4 -
Gravity valve To remove valve, unclip upward out of the
filler neck
- Check valve for flow:
Valve vertical: Flow

Valve tilted 45 : No Flow
5 -
O-ring
-Replace
Pa
ge 10 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-63


6 -
Ground connection
Location Fig. 1
, Page 20
-58
- Ensure tight fit of metal ring on fuel filler
neck
- Check chamfer on protective plate (item
7 ).
- After installing, check continuity between
metal ring on fuel filler neck and chassis
Ground point. Specified value: approx. 0

7 -
Protective plate
For fuel filler neckWith Ground connection
- Before threading in mounting screw (item
10 Page 20
-55
) check for tight fit on
screw eye of Ground connection
8 -
Sealing ring
Installed position: Sealing lip points to fuel
filler neck
Pa
ge 11 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-64


9 -
O-rings
Different sizes
-Replace
10 -
Bleed valve Removing, installing, checking Fig. 1
,
Page 20
-65

11 -
Bleed line
To EVAP canister
Pa
ge 12 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-65


Requirement Fig. 1 Bleed valve removing, installing, checking
Fuel tank removed.
- To remove, unclip valve from side of filler neck.
- Close off filler neck by hand -3-.
- Blow into filler neck -1- Button -2- pressed in direction of arrow: Flow Button -2- in OFF direction: NO Flow.
Pa
ge 13 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-66

Fuel tank, draining


Vehicles with all wheel drive and 1.8 ltr. turbo
or 2.8 ltr. engine

WARNING!

Fire hazard! Do NOT have anything in the
area that can ignite gasoline!
Observe Safety measures Page 20
-1 .
Observe Rules of cleanliness Page 20
-4 .

Required equipment

FM 3000 fuel storage cart (or equivalent)
Pa
ge 14 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-67

CAUTION!

Obtain the radio Anti-theft code from the
customer before disconnecting the Battery
Ground strap.

- Disconnect Battery Ground strap.
Ensure that ignition is switched OFF.
- Remove cover from fuel filler neck.
- Empty as much fuel as possible through the filler neck.
- Remove connector flange cover under luggage compartment trim.
Pa
ge 15 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-68

WARNING!

Fuel system is under pressure! Before
opening, place clean cloths around the
connections to be opened. Carefully loosen
the connections to relieve pressure.

- Mark return line -2-, supply line -3- and remove cover flange.
- Unlatch and disconnect 4-pin harness connector -1-.

- Unscrew union nut using 3217 wrench.
- Remove cover flange and sealing ring from fuel tank opening.
- Pump remaining fuel through the flange opening.
Pa
ge 16 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3