13 53 180 Replacing Delivery Line

13 53 180 Replacing delivery line (N14)

Special tools required:







WARNING:
Disconnect battery negative terminal (risk of fire due to short-circuiting on removal)
Carry out installation work on fuel system only with coolant temperature below 40°C.







IMPORTANT:
Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high velocity when the high-pressure line is released.







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 intake filter housing







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







Removal:

NOTE: For purposes of clarity, picture shows intake manifold removed.

Slacken nut (1).
Slacken nut (2).
Remove and discard delivery line (3).

IMPORTANT: The removed pressure line must not be reused; instead, it must be replaced.







Seal high-pressure rail and high-pressure pump with matching plugs (1) from special tool kit 32 1 270.







Installation of pressure rail is described separately from removal.







The procedure described below must be followed precisely (to avoid leaks):
1. When tightening screw connections, first tighten nut (3) and then nut (1)
2. Pre-install new delivery line (2), only hand-tighten nuts (3 and 1).
3. Mount special tool 13 0 220 for securing pressure line (2) to screw fastening point of intake manifold (4)
Tightening torque 11 61 1AZ.
4. Tighten nuts (3 and 1) according to tightening specifications 13 53 1AZ
- Tightening torque:
Nuts (3 and 1) 15 Nm
- Torque:
Nuts (3 and 1) 33 Nm
- Warm-up:
5 minutes
- Retighten:
Nuts (3 and 1) 33 Nm
5. Remove special tool 13 0 220
Tightening torque 11 61 1AZ.
6. Check fuel system for leaks.







Assemble engine.
Check function of DME.