Fuel Supply System Components, Removing and Installing
Fuel Supply System Components, Removing and Installing
NOTE: After repairs to fuel supply unit or fuel gauge sender unit are completed, be sure supply and return hoses do not make contact with fuel tank which could cause pump noise transfer.
1 - Collar nut
- Remove and install using tool 3217.
2 - Fuel return line
- Blue
- Secure with spring-type clips.
- Return line must be securely seated.
- Secure from fuel pressure regulator bracket
3 - 4-pin connector
- Black
- For Fuel Level sensor -G- and Fuel Pump -G6-
4 - Flange
- Note installed position on fuel tank.
- Underside marked with a "V" (for supply) and an "R" (for return) hoses.
5 - Supply hose
6 - Return hose
7 - Sealing ring
- Coat with fuel when installing.
- Replace if damaged.
8 - Fuel Level sensor -G-
9 - Fuel delivery unit
10 - Strainer
- Clean if contaminated.
11 - Fuel tank
- When removing; support using engine/transmission jack VAG 1383 A.
12 - Mounting straps
- Note different lengths.
13 - 25 Nm (18 ft lb)
14 - Bracket
- For mounting straps
15 - Splash shield
16 - Retaining ring
17 - Gasket
- If damaged; replace together with cap as an assembly
18 - Cap
19 - 10 Nm (7 ft lb)
20 - Check valve
- For fuel tank ventilation
21 - Breather tube
- To junction piece between EVAP canister and EVAP canister purge regulator valve
22 - Breather tube
- To EVAP canister
23 - Supply line
- Black
- Mount using spring clips
- Must be securely seated
- To fuel supply line (on lower intake manifold)
24 - Fuel filter
- Installed position: -arrow- points in direction of flow
25 - Bracket
- For fuel filter
26 - Breather tube
- Fill vent
27 - O-ring
28 - Gravity/vent valve
- Cannot be removed.
- Replace as an assembly together with filler neck.
Fig. 1 Fuel delivery unit/flange, installed position
Mark on flange must align with mark on fuel tank.
Fig. 2 Gravity/vent valve, checking
- Lever in rest position: No Flow
- Lever pushed in direction of arrow: Flow
Fig. 3 Check valve, checking
From direction of gravity/vent valve:
- Check valve is open in both directions of flow: arrow -1-.
From direction of EVAP canister/EVAP canister purge regulator valve 1 junction piece:
- Check valve is open in only one flow direction: arrow -2-.