- 1 - fixing nuts for connecting the pump to the power supply;
- 2 - electrical wires from the blind flange to the fuel pump;
- 3 - clamps for wires / hose;
- 4 - fuel hose;
- 5 - blind flange;
- 6 - clamping clamps;
- 7 - support housing with a fuel pump.
Quattro: hose between fuel pump (1) and blind flange (2) must be installed as shown in the figure.
Front wheel drive: the figure shows how the hose is mounted between the fuel pump (1) and blind flange (2). When mounting, turn the blind flange in the direction of the arrow as shown on the right.
This cutaway fuel tank shows how the fuel pump is removed. Although this requires a special tool (1), which rotates the inner part slightly to the left (2) intake manifold housing. The tool grabs with its paws (arrows) recesses of the internal part.
For fuel pump installation (1) with internal detail (2) intake manifold housing to the outer part (3) its housing must be in the correct installation position: the mark on the inner part of the intake manifold housing must be opposite the mark on the outer part (arrows).
This is a job already for the Audi workshop, since the fuel pump is dismantled together with the inner part of the intake manifold housing, and it can only be unscrewed from the outer part of the intake manifold using a special key 3307. Whoever can borrow the key must proceed as follows:
Order of execution
1. Make sure that the fuel tank is 2/3 full, otherwise gasoline will leak out!
2. Fold up the floor covering of the trunk.
3. Unscrew the black cover.
4. Disconnect the multi-pin connector.
5. Disconnect the recirculation line.
6. Disconnect the supply line.
7. Unscrew the synthetic union nut. Most often they sit very firmly. Therefore, install the bluntest screwdriver on the edge of the nut, and with light blows of the hammer on the handle of the screwdriver, loosen the nut. If necessary, tap on different ribs.
8. Now you can slightly pull up the blind flange of the fuel tank.
9. Loosen the clamping clamp on the recirculation line on the inside of the blind flange and pull the hose down.
10. Remove the fuel tank connector.
11. Install special key 3307 on the inside of the intake manifold housing.
12. Turn a little to the left until it stops the inner part of the intake manifold housing.
13. Take out the pump with an internal detail and together with a deaf flange from a fuel tank.
14. Mark/remember the mounting position of the pump, hoses, wires and wire bundles, as the parts must be mounted accurately during installation.
15. After unscrewing the discharge pipe (mounting position) the pump can be removed from the inside of the intake manifold housing. This is done differently depending on the pump version:
16. Pump 60 mm: turn the sieve under the inner part of the intake manifold housing to the left, remove the pump. During installation, the spout on the side of the pump must be pushed into the groove. Pay attention to the lining.
17. 40mm pump: squeeze the release collar at the top of the inside of the intake manifold housing, remove the pump. During installation, the pump can only be inserted in one position.
18. Mounting: Mount the hose between the pump and the blind flange as shown in the figures. The pump and blind flange must be in the correct position relative to each other.
19. If everything is assembled correctly, then the pump can be mounted again in the outer part of the intake manifold housing in the fuel tank.
20. Please note: the mark on the outer part must be opposite the marks on the inner part.
21. Screw the inner part again with the key 3307, install the remaining parts.
22. Mounting position of the blind flange: the arrow on the flange must be opposite the mark on the fuel tank. Vehicles with front-wheel drive and all-wheel drive have their own arrow.
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