13 53... Remove, install replace one injector (N55) as from engine number 14407685 (hold-down device concept at the top)

Special tools required:

13 0 320
00 9 170
13 0 191
13 0 283
13 0 281
13 0 282

It is of vital importance to adhere to the WARNINGS ON REMOVING THE INJECTORS !

Necessary preliminary tasks:

Disconnect NEGATIVE BATTERY TERMINAL (risk of fire due to short-circuiting on dismantling).
Remove IGNITION COIL of corresponding cylinder.
Disconnect pressure lines . See 13 53 192 REMOVING AND INSTALLING/REPLACING A PRESSURE LINE (CONTINENTAL HIGH-PRESSURE PUMP) (N55) or 13 53 192 REMOVING AND INSTALLING/REPLACING A PRESSURE LINE (BOSCH HIGH-PRESSURE PUMP) (N55) of corresponding cylinder.

NOTE: The following description applies to all injectors in cylinders 1-6.

Unlock connector (1) from injectors and detach.

Slacken nut (2).

Tightening torque: 12 90 5AZ .

Remove ground cable (3).

Fig 1: Identifying Ground Cable And Slacken Nut

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: First, release screw (2). The, release screw (1).
Otherwise, the hold-down device may tilt.

Remove holding-down element (3).

Pull injectors upward out of cylinder head and remove.

NOTE: If several injectors are removed, ensure that each injector is reinstalled in its original location (cylinder).

Mark injectors.

Fig 2: Identifying Hold-Down Device And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure in event of stuck injector

Use special tool 13 0 320 to remove injectors that are stuck.

Lightly oil pull-out thread (1) and unscrew completely (see Fig 3) before using the special tool.

IMPORTANT: Pull-out thread (1) is a left-hand thread!

Fig 3: Identifying Oil Pull-Out Thread

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool (1) 13 0 320 on injector slot. Join screws (2) to injector slot by a few threads. Screw in pull-out thread (4) until it is possible to screw the threaded sleeves (3) onto the injectors. Screw threaded sleeves (3) onto injectors and tighten down.

Tighten down screws (2).

Tightening torque: 13 53 13AZ .

Fig 4: Identifying Screw Threaded Sleeves Onto Injectors

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Set torque wrench (1) to 5 Nm clockwise rotation. Together with special tool 13 0 320 this corresponds to a tensile force of max. 2000 N. The injector must be replaced if the torque wrench is activated when the injector is pulled out!

Fit torque wrench (1) and special tool (2) 00 9 170 on hexagon head (3) of special tool 13 0 320 .

Turn torque wrench (1) in clockwise direction until the injector is pulled out.

Fig 5: Turning Torque Wrench Clockwise

Courtesy of BMW OF NORTH AMERICA, INC.

After removing, fit protective caps (1 and 2) to injector tip and fuel line connection.

Installation note:

When installing a new injector:

Replace decoupling element (3).

Fig 6: Identifying Protective Caps To Injector & Decoupling Element
Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

When reusing fuel injector:

Replace decoupling element (1).
Replace Teflon ring (2).
A Teflon ring that has already been installed once in the cylinder head must be replaced before the injector is reinstalled.

Fig 7: Identifying Decoupling Element And Teflon Ring
Courtesy of BMW OF NORTH AMERICA, INC.

Replace Teflon ring

Before replacing the Teflon ring (1), make sure your hands and the work surface are clean and free of oil.

Avoid mechanical contact with injector tip (2).

Fig 8: Identifying Teflon Ring And Injector Tip

Courtesy of BMW OF NORTH AMERICA, INC.

Remove Teflon ring (2) with special tool (3) 13 0 191 from injector (1).

Use a fluff-free cloth only to remove combustion residues from cylindrical part of injector tip (do not use ultrasound or other tools/agents).

Do not clean injector tip.

Fig 9: Removing Teflon Ring From Injector

Courtesy of BMW OF NORTH AMERICA, INC.

Push new Teflon ring (1) onto the installation cone (2) 13 0 283 .

Fig 10: Identifying Teflon Ring & Cone

Courtesy of BMW OF NORTH AMERICA, INC.

Mount Teflon ring (1) with installation cone (2) 13 0 283 onto injector tip (3).

NOTE:

Do not use fingernails to slide Teflon ring on.
Do not use any lubricating agents.
The sealing ring is expanded when slid on.

Fig 11: Identifying Teflon Ring And Injector Tip

Courtesy of BMW OF NORTH AMERICA, INC.

Using special tool (1) 13 0 281 push Teflon ring into injector groove (3).

Fig 12: Pushing Teflon Ring Into Injector Groove

Courtesy of BMW OF NORTH AMERICA, INC.

To bring the widened Teflon ring to installation size, push special tool (1) 13 0 282 as far as it will go onto injector (2).

Do not use any lubricating agents.

Fig 13: Pushing Special Tool Onto Injector

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Pull mounting tip (1) of special tool 13 0 282 towards rear to release mounting taper (2) 13 0 281 .

Fig 14: Pulling Mounting Tip Of Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Installing injector

Before installing injector in engines that have been run:

IMPORTANT: Injectors must not be twisted to 6 Nm!
The injector must be replaced if this value is exceeded!

Check injector bore for dirt.

Clean only dirty injector bores.

Important - do not damage injector!

Clean injector bore: To do so, preferably slide injector without decoupling element (1) but with new Teflon ring (2) in and out of injector bores several times.
The Teflon ring must subsequently be replaced.
Clean contact surfaces of decoupling elements (1) in cylinder head.
Replace decoupling element (1).

Fig 15: Identifying Decoupling Element And Teflon Ring
Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Injection quantity compensation!

An injector quantity compensation must be carried out if an injector is replaced or changed on the cylinder side.

Injector quantity compensation is carried out with the aid of a so-called adjustment value.

The adjustment value is printed in three digits on the injector body.

The adjustment value must be read off before installation!

Fig 16: Identifying Adjustment Value Printed In Three Digits On Injector Body

Courtesy of BMW OF NORTH AMERICA, INC.

Enter the adjustment value according to the installation location (cylinder) of the injector.

If injector quantity compensation is not carried out, the engine may run roughly or fail to start.

Injection quantity compensation is described at the end of these instructions.

Insert injectors in injector bores.

Fit special tool (1) 13 0 320 on injector slot. Join screws (2) to injector slot by a few threads. Screw in the pull-out thread (4) until the threaded sleeves (3) can be screwed onto the injectors. Screw threaded sleeves (3) onto injectors and tighten down.

Tighten down screws (2).

Tightening torque: 13 53 13AZ .

Fig 17: Identifying Screw Threaded Sleeves Onto Injectors

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Set torque wrench (1) to 2 Nm counterclockwise rotation.

Fit torque wrench (1) and special tool (2) 00 9 170 on hexagon head (3) of special tool 13 0 320 .

Turn torque wrench (1) in counterclockwise direction until 2 Nm are reached.

Fig 18: Turning Torque Wrench Counterclockwise

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Install hold-down device (1) with curvatures (black arrows) downward.

Fig 19: Installing Hold-Down Device With Curvatures

Courtesy of BMW OF NORTH AMERICA, INC.

Fit hold-down device (3) on injectors.

Tighten screws (1) and (2) only hand-tight.

Fig 20: Identifying Rubber Mount And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Install pressure lines on injectors and rail. Tighten nuts (1) and (2) manually only.

Installation note:

Reinstall line damper (3).

Fig 21: Identifying Pressure Lines On Injectors And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Firstly tighten screw (1).

Tightening torque: 13 53 6AZ .

Then tighten down screw (2).

Tightening torque: 13 53 6AZ .

Fig 22: Identifying Rubber Mount And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down pressure lines on injectors (1).

Tightening torque: 13 53 9AZ .

Then tighten down pressure lines (2) on the rail.

Tightening torque: 13 53 9AZ .

Installation note:

Reinstall line damper (3).

Fig 23: Identifying Down Pressure Lines On Injectors

Courtesy of BMW OF NORTH AMERICA, INC.

Before installing injector in engines that have been run

IMPORTANT: Injectors must not be twisted to 6 Nm!
The injector must be replaced if this value is exceeded!

Check injector bore for dirt.
Clean only dirty injector bores.

Important - do not damage injector!
Clean injector bore: To do so, preferably slide injector without decoupling element (1) but with new Teflon ring (2) in and out of injector bores several times.
The Teflon ring must subsequently be replaced.
Clean contact surfaces of decoupling elements (1) in cylinder head.
Replace decoupling element (1).

Fig 24: Identifying Decoupling Element And Teflon Ring
Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Injection quantity compensation!

An injector quantity compensation must be carried out if an injector is replaced or changed on the cylinder side.

Injector quantity compensation is carried out with the aid of a so-called adjustment value.

The adjustment value is printed in three digits on the injector body.

The adjustment value must be read off before installation!

Fig 25: Identifying Adjustment Value Printed In Three Digits On Injector Body

Courtesy of BMW OF NORTH AMERICA, INC.

Enter the adjustment value according to the installation location (cylinder) of the injector.

If injector quantity compensation is not carried out, the engine may run roughly or fail to start.

Injection quantity compensation is described at the end of these instructions.

Insert injectors in injector bores.

Tighten down screws (2).

Tightening torque: 13 53 13AZ .

Fig 26: Identifying Screw Threaded Sleeves Onto Injectors

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Set torque wrench (1) to 2 Nm counterclockwise rotation.

Fit torque wrench (1) and special tool (2) 00 9 170 on hexagon head (3) of special tool 13 0 320 .

Turn torque wrench (1) in counterclockwise direction until 2 Nm are reached.

Fig 27: Turning Torque Wrench Counterclockwise

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Install hold-down device (1) with curvatures (black arrows) downward.

Fig 28: Installing Hold-Down Device With Curvatures

Courtesy of BMW OF NORTH AMERICA, INC.

Fit hold-down device (3) on injectors.

Tighten screws (1) and (2) only hand-tight.

Fig 29: Identifying Hold-Down Device And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Install pressure lines on injectors and rail. Tighten nuts (1) and (2) manually only.

Installation note:

Reinstall line damper (3).

Fig 30: Identifying Pressure Lines On Injectors And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Firstly tighten screw (1).

Tightening torque: 13 53 6AZ .

Then tighten down screw (2).

Tightening torque: 13 53 6AZ .

Fig 31: Identifying Hold-Down Device And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down pressure lines on injectors (1).

Tightening torque: 13 53 9AZ .

Then tighten down pressure lines (2) on the rail.

Tightening torque: 13 53 9AZ .

Installation note:

Reinstall line damper (3).

Fig 32: Identifying Pressure Lines On Injectors And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Perform an injection quantity compensation

The adjustment value is printed with three digits - depending on the version - on the injector body.

Connect BMW diagnosis system.
Identify vehicle.
Select "Function selection."
Select "Service functions."
Select "Engine electronics."
Select "Adjustment functions."
Select "Adjust injectors."
Select "Test plan"
For each replaced injector, the adjustment value must be entered according to the installation location (cylinder).

Fig 33: Identifying Adjustment Value Printed In Three Digits On Injector Body
Courtesy of BMW OF NORTH AMERICA, INC.

Clean spark plug slot.

Assemble engine.

Check fuel system for tightness.

Check function of DME.