13 53 180 Replacing Pressure Line

13 53 180 - Replacing delivery line (N14)





Special tools required:
- 13 0 220
- 32 1 270





Warning!
Disconnect battery negative terminal 61 20 900 Disconnecting and Connecting Battery Negative Lead (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 Service and Repair





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.

Installation:





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 [1][2]11 61 Intake Manifold.
4. Tighten nuts (3 and 1) according to tightening specifications 13 53 1AZ 13 53 Fuel Injectors and Lines
- 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 [1][2]11 61 Intake Manifold.
6. Check fuel system for leaks Pressure Line Leak Test.





Assemble engine.

Check function of DME.