13 53 170 Removing and installing/replacing all pressure lines (N74): Notes

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WARNING: Electric fuel pump starts up automatically when door is opened!
Disconnect BATTERY NEGATIVE TERMINAL (risk of fire due to short-circuiting on removal).
Observe warning on cylinder head cover.

WARNING: Carry out installation work on fuel system only with coolant temperature below 40 °C.

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 32 1 270 .

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

NOTE:

Ignition coils must not be wetted with 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.

Necessary preliminary tasks:

Remove IGNITION COILS
Remove INTAKE PLENUM

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

Catch and dispose of escaping fuel.

Fig 1: Sealing Off Fuel Lines Using Special Tools (13 5 160 And 13 5 162)

Courtesy of BMW OF NORTH AMERICA, INC.