13 53 192 Removing and installing or replacing a high-pressure line (N54, N53): Notes

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 1 270
37 1 151

WARNING: Observe warning on cylinder head cover.
Clamp off 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.

WARNING: 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.
High-pressure lines may be rescrewed a maximum of 10 times.

Necessary preliminary tasks:

Remove IGNITION COIL of corresponding cylinder

NOTE:

Ignition coils must not be fouled by fuel!
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail! Cloths/rags must therefore be used to prevent fuel from getting into the spark plug slots!
Before installing ignition coils, clean spark plug slots with compressed air.
Make sure the spark plug slot is absolutely clean.

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

WARNING: Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high velocity from the fuel injectors!
To reduce the fuel pressure, place rag over fuel injector and carefully tap against the fuel injector with a spanner.
There is a risk of injury if the fuel pressure is not reduced!

NOTE: The following description applies to all pressure lines.

First release rail pressure lines to reduce existing fuel pressure if necessary. Fuel must not get into the spark plug slot. Then release pressure line on injector.

Release nuts (1), gripping the injector with a wrench (2) in so doing.

Disconnect pressure line (3).

Fig 1: Disconnecting Pressure Line

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: If several pressure lines are removed, ensure that each pressure line is reinstalled in its original location (cylinder).
Mark pressure lines.

Close off injector with protective cap (1).

Protective caps are available from BMW Parts Service.

Seal high-pressure rail with a matching plug from special tool kit 32 1 270.

Fig 2: Identifying Protective Cap With Special Tool Kit (32 1 270)

Courtesy of BMW OF NORTH AMERICA, INC.

Seal pressure line (1) with a matching plug from special tool kit 32 1 270.

Fig 3: Identifying Pressure Line With Special Tool Kit (32 1 270)

Courtesy of BMW OF NORTH AMERICA, INC.