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

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. 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 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 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 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! 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 IGNITION COILS.
Detach POSITIVE BATTERY CABLE from positive battery connection point, partially remove positive battery cable.
Remove ELECTRONICS BOX.
Remove WATER VALVE for heater/air conditioner and lay coolant hoses to one side.
Detach tank vent line from tank venting valve and point of separation.
Remove suspension cross-braces . See 51 71 345 REMOVING AND INSTALLING / REPLACING LEFT (REAR) SUSPENSION CROSS-BRACE or 51 71 346 REMOVING AND INSTALLING / REPLACING RIGHT (REAR) SUSPENSION CROSS-BRACE on left and right.
Draw off A/C SYSTEM. .
Remove intake pipes on left and right. See 13..... Removing intake duct (N63) .

Only for injectors, cylinders 1 -4:

Release screw (1).

Tightening torque 64 53 3AZ.

Detach A/C line (2) and place to one side.

Replace sealing ring on A/C line.

Fig 1: Identifying A/C Line With Mounting Screw

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Only for injectors, cylinders 5 -8:

Slacken nut (1).

Tightening torque 12 42 7AZ.

Remove positive battery cable (2) and place to one side.

Fig 2: Identifying Battery Positive Lead With Slack Nut

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Picture shows the left side, the procedure for the right side is identical.

Detach hoses (1) from clean air pipe.

Release screw (2).

Tightening torque 13 71 1AZ. .

Detach clean-air pipe (3) in direction of travel from exhaust turbocharger.

Check the gasket on the clean air pipe. replacing if necessary.

Fig 3: Identifying Clean-Air Pipe, Hoses And Screw

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Release screws (1).

Tightening torque 12 51 2AZ.

Release the screw (2) from the gutter.

Unlock and pull the connector off the injectors.

Lay wiring harness (3) to one side.

Feed out air wiring harness (4) and remove.

Fig 4: Identifying Screw, Wiring Harness And Wiring Loom

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NOTE: Check wiring harness installation arrangement. Check plug connections for correct fit.

Release screws (1).

Tightening torque 12 51 2AZ.

Raise cable duct (2).

Fig 5: Identifying Cable Duct And Screw

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

Catch and dispose of escaping fuel.

Fig 6: Sealing Fuel Lines With Special Tools (13 5 160 And 13 5 162)

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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.

Fig 7: Identifying High Pressure Fuel Lines With Union Nuts

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Release union nuts (1).

Disconnect pressure line (2).

Set down pressure lines in order.

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 location (cylinder).

Mark pressure lines.

Fig 8: Removing Union Nut Using Wrench

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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 9: Turning Injector

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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 10: Tightening High-Pressure Fuel Line On Injector Using Torque Wrench And Special Tool (13 0 161)

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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 11: Tightening Pressure Line Using 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 12: Tightening Pressure Line On Rail Using Torque Wrench And Special Tools (001440, 13 0 162 And 13 0 161)

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Remove high pressure line from high pressure pump to rail.

Picture shows left side. Procedure on right side identical.

Release union nuts (1).

Disconnect pressure line (2).

Fig 13: Identifying High Pressure Line With 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 14: Tightening High-Pressure Line On High-Pressure Pump Using Torque Wrench And Special Tool (00 1 440)

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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 15: Identifying Angle Of Rotation For Special Tool (13 0 140)

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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 16: Tightening High-Pressure Line On Rail Using Torque Wrench, Long Crowfoot Spanner And Special Tool (13 0 140)

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Assemble engine.

Bleed fuel system with BMW diagnosis system.

Check fuel system for tightness.

Check function of DME.