2000 AUDI A4 Fuel Supply System Front Wheel Drive 1.8T And 2.8 Workshop Manual

20-14


Fuel filler neck, component overview
(vehicles with ORVR)

Vehicles with front wheel drive and 1.8 ltr. turbo
or 2.8 ltr. engine
1 -
Bleed line
To top of filler neck on fuel tank
2 -
Expansion tank Clipped to fuel-filler neck
3 -
Tank ventilation valve Clipped to fuel-filler neckVentilates fuel tank for pressure
compensation
Pa
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20-15


4 -
Ground connection
Location Fig. 1
, Page 20
-10
- Ensure tight fit of connector on filler neck
ring
- Connect wiring terminal with mounting
screw for plastic fuel filler neck (item 6
Page 20
-8 ).
- After installing, check continuity between
ring on fuel filler neck and chassis
Ground, spec: approx. 0
5 -
Gravity valve
To remove valve, unclip upward out of filler
neck
- Check valve for flow:
Valve vertical: Flow

Valve tipped 45 : No Flow
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gine
)
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20-16


6 -
O-ring
-Replace
7 -
Sealing ring
Installation position: Sealing lip points to
the fuel filler neck
8 -
O-rings Different sizes
-Replace
9 -
Bleed valve Removing, installing, checking Fig. 1
,
Page 20
-17

10 -
Bleed line
To EVAP canister
Pa
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)
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20-17


Requirement
Tab -2- pressed in direction of arrow:
Tab -2- in OFF position: Fig. 1 Bleed valve, removing, installing, checking
Fuel tank removed
- To remove, unclip valve from side of filler neck.
- Plug port -3- by hand.
- Blow into port -1-Must be flow Must NOT be flow.
Pa
ge 12 of 49 Fuel su
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ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
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yp
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20-18

Fuel tank, draining


Vehicles with front 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 .

Auxiliary equipment required

FM 3000 fuel cart (or equivalent)

CAUTION!

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

- Disconnect Battery Ground strap with ignition switched OFF.
- Remove filler cap from fuel filler neck.
- Empty fuel tank as completely as possible through the filler neck.
Pa
ge 13 of 49 Fuel su
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ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
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pair&id=AUDI.B5.GE04.20.2

20-19

Fuel tank assembly, removing and
installing


Vehicles with front wheel drive and 1.8 ltr.
turbo or 2.8 ltr. engine
Observe Safety measures Page 20
-1 .
Observe Rules of cleanliness Page 20
-4 .

Required special tools, testing equipment
and auxiliary equipment

VAG1359/2 Universal holder
VAG1383 A Engine / transmission jack

Removing

CAUTION!

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

- Disconnect Battery Ground strap with ignition switched OFF.
- Open fuel tank cover briefly and close again.
Pa
ge 14 of 49 Fuel su
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ly system, servicin
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gine
)
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20-20

- If necessary, drain fuel tank using fuel cart
Page 20
-18
.

Note:
For handling reasons, fuel tank must be empty
before removing.

- Remove connector flange cover under luggage
compartment trim.

Note:
Return line -2- and supply line -3- stay connected. - Unlatch and disconnect 4-pin harness connector -1-.
- Clean area around fuel filler neck.
- With filler cap removed, pry out clamping ring on rubber seal (around
filler neck).
- Push rubber seal toward inside.
- Remove right rear wheel.
- Remove right rear wheel house liner.

- Remove screw -2- for fuel filler neck under wheel house liner.
Pa
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ly system, servicin
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)
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20-21


WARNING!
Fuel system is under pressure! Before opening, place clean cloths
around the connections to be opened. Carefully loosen the
connections to relieve pressure. - If present, remove the aerodynamic trim panel from the rear axle -
arrows-

- Mark and remove the supply line -1- and return line -2- .
On bottom of vehicle
Pa
ge 16 of 49 Fuel su
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ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.2