13 53 332 Removing and Installing/Replacing Feed Line

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

Special tools required:







WARNING:
Disconnect negative battery terminal (risk of fire due to short circuit on dismantling).
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 contamination before removing lines or separate components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs.

Ignition coils must not be contaminated by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail.
Cover ignition coil with suitable means.







Necessary preliminary tasks:
- Remove left intake filter housing







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 the gaskets on the exhaust 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 exhaust turbocharger.
Check the gasket on the clean air pipe, replacing if necessary.







Unlock and disconnect fuel delivery 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 screws (1) on retaining clips.
Tightening torque 13 53 7AZ.
Feed out and remove fuel feed line (2).







Installation note:
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 tightness.
Check function of DME.

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