13 53 170 Removing and installing/replacing all pressure lines (N63)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

WARNING: Electric fuel pump starts up automatically when door is opened!
Disconnect NEGATIVE BATTERY TERMINAL (risk of fire due to short-circuiting on dismantling).
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 speed when the high pressure line is released!

IMPORTANT: Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.
Introduced dirt contamination 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 lines or separate 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 collecting vessel.

Observe country-specific waste disposal regulations.

NOTE:

Ignition coils must not be fouled by fuel!
The durability of the silicone material is greatly reduced by contact with fuel, which can lead to failure of the ignition coil. It is therefore essential to protect the spark plug slot against ingress of fuel with a cloth!
Before installing ignition coils, clean spark plug slots with compressed air.
Make sure the spark plug slot is absolutely clean.

Necessary preliminary tasks:

REMOVE ALL IGNITION COILS
REMOVE WATER VALVE
REMOVE ENGINE TANK VENTILATION LINE CYL. 1-4
REMOVE ENGINE TANK VENTILATION LINE CYL. 5-8
REMOVE FUEL LOW-PRESSURE SENSOR
Detach tank ventilation line from tank vent valve and separation point
Remove LOWER SECTION OF STEERING SHAFT

Lever out expanding rivet.

Release locks in direction of arrow.

Feed out fresh-air duct (1) and remove.

Fig 1: Removing Fresh-Air Duct And Locks

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Open retainers.

Release lock (1) in direction of arrow.

Remove cover (2).

Fig 2: Releasing Electronics Box Cover And Lock

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Unlock upper section (1) of partition seal in direction of arrow and remove.

Release grommet (2) for wiring harness from lower section of the partition wall sealing.

Installation note:

Make sure grommets are correctly seated (watertightness).

Fig 3: Removing Upper Section Of Partition Seal

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IMPORTANT: Screw back on all screw points of cable channels without fail ! Some screw points are also ground points. If the wiring harnesses are not correctly screwed tight and secured, this may cause DME malfunction and failure!

Release screw (1).

Tightening torque: 12 51 2AZ .

Raise cable duct (2).

Fig 4: Identifying Cable Duct And Screw

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Release screws (1).

Tightening torque: 12 51 2AZ .

Release wiring harness (2) and place to one side.

Release wiring harness (3) and place to one side.

IMPORTANT: Screw back on all screw points of cable channels without fail. Some screw points are also ground points .

Fig 5: Identifying Wiring Harness And Screws

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Release screws (1).

Tightening torque: 12 51 2AZ .

Raise cable duct (2).

Fig 6: Identifying Cable Duct And Screws

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Unfasten screws (2).

Tightening torque: 12 51 2AZ .

Unlock plugs on injectors and ignition coils and detach.

Place wiring loom (4) to one side.

Raise wiring harness (3) and place to one side.

IMPORTANT: Screw back on all screw points of cable channels without fail. Some screw points are also ground points .

Fig 7: Identifying Wiring Harness And Wiring Loom

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Remove pressure line from injector to rail.

NOTE: The following description applies to all pressure lines.
First disconnect the pressure line from the rail. To reduce existing fuel pressure if necessary. Fuel must not get into the spark plug slot. Then disconnect the pressure line from the injector.

Release union nuts (1).

Disconnect pressure line (2).

Set down pressure lines in order.

Fig 8: Identifying Pressure Line And Union Nuts

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Secure injector against twisting with spanner (2).

Release union nut (1).

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

Fig 9: Releasing Union Nut

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Installation note:

Only if injector has to be rotated in fitted position:

Release bolt a few turns until holding-down device (3) is slackened.
Turn injector (1) in direction of arrow until union nuts (2) on pressure line can be easily screwed on by hand.
To do so, engage spanner on hexagon head of injector if necessary.
Tighten union nuts on pressure line hand-tight.

Fig 10: Turning Injector On Pressure Line
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IMPORTANT: Do not under any circumstances pull injector out of bore hole!
If the injector is pulled out of the bore hole, the PTFE sealing ring must be replaced! Replacing PTFE sealing ring, refer to 13 53 315 .

Adhere to tightening sequence:

First tighten down union nut on injector.
Then tighten down union nut on rail.

Tighten pressure lines with special tool 13 0 160 .

Tighten pressure line on injector with torque wrench (2) and special tool (1) 13 0 161 . Secure the injector from turning.

Tighten union nuts with special tool (1) 13 0 161 .

Tightening torque: 13 53 2AZ .

Fig 11: Tightening Pressure Line On Injector With Torque Wrench And Special Tool

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For cylinders 4 and 8, tighten pressure line (1) with torque (2) and crowfoot wrench (3). Secure the injector from turning.

Tightening torque: 13 53 2AZ .

Fig 12: Tightening Pressure Line With Torque And Crowfoot Wrench

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Tighten down pressure line on rail with torque wrench (1) and special tools (2) 00 1 440 , (3) 13 0 162 and (4) 13 0 161 .

Tightening torque: 13 53 2AZ .

Installation note:

When tightening the pressure line on the rail, ensure that the angle of rotation of special tool 13 0 161 is restricted. Reapply the special tool if necessary.

Distortion of torque possible.

Fig 13: Tightening Pressure Line On Rail With Torque Wrench And Special Tools

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Remove high pressure line from high pressure pump to rail.

Picture shows left side. Procedure for the right side is identical.

Release union nuts (1).

Disconnect pressure line (2).

Fig 14: Identifying Pressure Line And Union Nuts

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Refit high pressure line from high pressure pump to rail.

Tighten down pressure line (1) hand-tight on rail and injector.

First tighten high-pressure line (1) on high-pressure pump using torque wrench (2) and special tool (3) 00 1 440 .

Tightening torque: 13 53 3AZ .

Fig 15: Tightening High-Pressure Line On High-Pressure Pump Using Torque Wrench

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Installation note:

When tightening the pressure line on the rail, ensure that the angle of rotation of special tool 13 0 140 is restricted. Reapply the special tool if necessary.

Fig 16: Tightening Pressure Line On Rail

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Tighten high-pressure line (1) on rail using torque wrench (2), long crowfoot spanner (3) and special tool (4) 13 0 140 .

Tightening torque: 13 53 3AZ .

Fig 17: Tightening High-Pressure Line On Rail Using Torque Wrench

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Assemble engine.

Bleed fuel system with BMW diagnosis system.

Check fuel system for tightness.

Check function of DME.