Removing and installing or replacing an injector (N63 B40/B44 O 1, S63 B44 T 2) (X6 M)

Special tools required: 

• 00 9 170
• 13 0 320
• 2 249 115
• 13 0 190
• 13 0 280

Observe screwing sequence! 

1. Tighten screws (3) on rail. Tightening torque 13 53 1AZ .
2. Tighten nuts (1) on the injectors. Tightening torque 13 53 2AZ .
3. Tighten nut (2) on the high pressure pump. Tightening torque 13 53 3AZ .

• Under dusty/sandy operating conditions, dust and sand settle in columns, joints and cavities on the cylinder head in the area of the injectors. The consequences of noncompliance are malfunctions, damage and early wear/failure of the engine!
• CAUTION: In cavities that are not tightly closed in the cylinder head covers, there is a high probability of dust and sand contamination. 
• The threaded holes in the cylinder head for the screws of the injector hold-down devices are affected due to this. If the contamination is not removed, the screw of the hold-down device or the special tool for removing/installing the injector may not be screwed in correctly, or the threads of the cylinder head such as screw will be damaged!
• Clean the threaded hole thoroughly with compressed air (air gun with lance) and with the use of vacuum cleaner (narrow/pointed air vent). For this, blow on the cylinder head - in the area of the black control guide (cylinder head cover seal) and vacuum at the top on the bore hole in the cylinder head cover and vice versa with compressed air alternately. If the screw of the hold-down device/special tool cannot be screwed in smoothly and completely by hand, repeat cleaning until the screw can be screwed in smoothly and completely.

Necessary preliminary work: 

• Remove IGNITION COILS .
• Remove LEFT FUEL RAIL  and RIGHT FUEL RAIL .

Observe screwing sequence! 

1. Tighten screws (3) on rail. Tightening torque 13 53 1AZ .
2. Tighten nuts (1) on the injectors. Tightening torque 13 53 2AZ .
3. Tighten nut (2) on the high pressure pump. Tightening torque 13 53 3AZ .

Before removing the injectors, clean or vacuum off injector shafts.

Blow out the injector shafts with an air gun (1) with less pressure.

Simultaneously, draw off the dirt particles with an explosion proof vacuum cleaner (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Injector removal 

Release screw (1).

Remove holding-down element (2).

Pull injectors upward out of cylinder head and remove.

Courtesy of BMW OF NORTH AMERICA, INC.

Procedure in event of stuck injector: 

Unscrew pull-out thread (1) from special tool 13 0 320.

Courtesy of BMW OF NORTH AMERICA, INC.

Screw pull-out thread (1) from special tool 13 0 320 into the special tool 2 249 115.

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

Courtesy of BMW OF NORTH AMERICA, INC.

Fit special tool (1) 2 249 115 on injector slot. Insert screws (2) and (3) in injector shaft by a few threads. Screw in pull-out thread (4) until it is possible to screw the threaded sleeves (5) onto the injectors. Screw threaded sleeves (5) onto injectors and tighten down.

Tighten screws (2) and (3).

Tightening torque 13 53 9AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Fit torque wrench (1) and crowfoot spanner (2) on hexagon head (3) of special tool 13 0 320.

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

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).

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.

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).

Courtesy of BMW OF NORTH AMERICA, INC.

Remove Teflon ring (2) using special tool (3) 13 0 191 from the set of special tools 13 0 190 from the 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.

Courtesy of BMW OF NORTH AMERICA, INC.

Push new Teflon ring (1) onto installation cone (2) 13 0 283 from the set of special tools 13 0 280.

Courtesy of BMW OF NORTH AMERICA, INC.

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

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool (1) 13 0 281 from set of special tools 13 0 280 to slide Teflon ring into groove (3) on injector.

Courtesy of BMW OF NORTH AMERICA, INC.

To bring the widened Teflon ring to the installation dimension, special tool (1) 13 0 282 from set of special tools 13 0 280 must be slid up to limit position on injector (2).

Do not use any lubricating agents.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.

Installing injector: 

Before installing injector in engines that have been run: 

Courtesy of BMW OF NORTH AMERICA, INC.

• 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.

  Teflon ring must then be replaced.

• Clean contact surfaces of decoupling elements (1) in cylinder head.
• Replace decoupling element (1).

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

Injection 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.

Courtesy of BMW OF NORTH AMERICA, INC.

The adjustment value must be read off before  installation!

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.

Description of injector quantity compensation at end of instructions.

Insert injectors in injector bores.

Fit special tool (1) 2 249 115 on injector slot. Insert screws (2) and (3) in injector shaft by a few threads. Screw in pull-out thread (4) until it is possible to screw the threaded sleeves (5) onto the injectors. Screw threaded sleeves (5) onto injectors and tighten down.

Tighten screws (2) and (3).

Tightening torque 13 53 9AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Fit torque wrench (1) and crowfoot spanner (2) on hexagon head (3) of special tool 2 249 115.

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

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

Courtesy of BMW OF NORTH AMERICA, INC.

Fit hold-down device (2) on injectors.

Courtesy of BMW OF NORTH AMERICA, INC.

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

First insert the rail at the pump connector (2), then lower to the point where the ball heads are positioned inside the injector cones and the rail is correctly positioned.

Then tighten the nuts (1) on the injectors so they are hand-tight. Next, hand-tighten the nut (2) of the high pressure pump. Lastly, mount screws (3) and hand-tighten.

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten screws (3).

Tightening torque 13 53 1AZ .

Observe screwing sequence  .

1. Tighten screws (1) on injector hold-down device. Tightening torque 13 53 5AZ .
2. Tighten nuts (2) on the injectors. Tightening torque 13 53 2AZ .
3. Tighten nut (3) on the high pressure pump.

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 13 53 4AZ .

Perform an injection quantity compensation: 

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

Clean spark plug slot.

Assemble engine.

Check fuel system for leak tightness.

Check function of DME.