13 53 180 Removing and Installing or Replacing Pressure Line (Between High-Pressure Pump and Left or Right Rail)

13 53 180 Removing and Installing or Replacing Pressure Line (Between High-Pressure Pump and Left or Right Rail) (N74)

Special tools required:







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







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 fouled 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 intake plenum







Remove high-pressure line from high-pressure pump to rail.
Picture describes the right side, the procedure for the left side is identical.
Release union nuts (1).
Disconnect pressure line (2).







Refit high-pressure line from high-pressure pump to rail.
Tighten down pressure line (1) hand-tight at rail and high-pressure pump.
First tighten down pressure line (1) on high-pressure pump to torque (2) and with crowfoot wrench (3).
Then tighten down pressure line on rail.
Tightening torque 13 53 3AZ.







Assemble engine.
Vent fuel system with BMW diagnosis system.
Check fuel system for leaks.
Check function of DME.