13 53 332 Removing and Installing/Replacing Feed Line

13 53 332 Removing And Installing/Replacing Feed Line (N63)

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 and right intake filter housings







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







Release clamps (1) and (2).
Replace clamps (2).
Detach both charge-air ducts (3) and remove.
Check gaskets on turbocharger, replacing if necessary.







Picture shows the left side, the procedure for the right side is identical.
Detach hoses (1) from clean-air pipe.
Release screw (2).
Tightening torque 13 71 1AZ .
Detach clean-air pipe (3) in direction of travel from turbocharger.
Check seal on clean-air pipe, replacing if necessary.







Unlock and disconnect fuel feed line (1).
Seal fuel lines with special tools 13 5 160 and 13 5 162
Unlock and disconnect plug (2) on fuel low-pressure sensor.
Release fuel feed line (3) on high-pressure pump.
Tightening torque 13 53 4AZ .
Release screws (4).
Tightening torque 13 53 6AZ .
Catch and dispose of escaping fuel.







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







Release fuel feed line (1) on high-pressure pump.
Tightening torque 13 53 4AZ .
Catch and dispose of escaping fuel.







Release nuts (1) on retaining clips.
Tightening torque 13 53 7AZ .
Feed out and remove fuel feed line (2).







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


- 2. Tighten down fuel feed line (1) on high-pressure pumps to torque (2) and with crowfoot wrench (3).
Tightening torque 13 53 4AZ .

- 3. Tighten down lugs 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.