13 53 332 Removing and Installing/Replacing Feed Line

13 53 332 Removing and Installing/Replacing Feed Line (N74)

Special tools required:







WARNING:
Disconnect battery negative terminal (risk of fire due to short-circuiting on removal).
Electric fuel pump starts up automatically when door is opened.
Carry out installation work on fuel system only with coolant temperature below 40 °C.







Wear safety goggles.
Wear protective gloves.







IMPORTANT:
Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.
Introduced contaminants can cause malfunctions in the system.
- Do not allow any dirt particles or foreign bodies to get into the system.
- Remove all traces of dirt before removing pipes or individual components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs.







Necessary preliminary tasks:
- Remove left intake silencer housing
- Remove left intake duct







Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste-disposal regulations.







Seal fuel lines with special tools
(1) 13 5 160 and (2) 13 5 162.







Release screw (1) on feed line retaining tab.







Release fuel feed line (4) on high-pressure pumps (1).
Release screw (2).
Release screws (3) on low-pressure fuel sensor.
Feed out and remove fuel feed line (2).
Catch and dispose of escaping fuel.







Installation:
Observe tightening sequence.
- 1. Fit fuel feed line (4).
In so doing, tighten screw connections hand-tight only.

- 2. Tighten down fuel feed line (4) on high-pressure pumps with torque wrench and with crowfoot wrench.
Tightening torque 13 53 4AZ.

- 3. Tighten down lugs (3) on fuel low-pressure sensor.
Tightening torque 13 53 6AZ.

- 4. Tighten down retaining clips.
Tightening torque 13 53 7AZ.







Assemble engine.
Check fuel system for leaks.
Check function of DME.