Installing injector

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Installation of injector is described separately from removal.

Before installing injector in engines that have been run:

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 uncoupling element (2) but with new PTFE sealing ring (1) in and out of injector bores several times.
The PTFE sealing ring must then be replaced.
Clean contact surfaces of uncoupling elements (2) in cylinder head.
Replace uncoupling element (2).

Fig 1: Identifying Element And Sealing Ring

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IMPORTANT: Injector adjustment!

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

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

The adjustment value is printed in two blocks of three digits on the injector.

The adjustment value must be read off before installation!

Fig 2: Identifying Adjustment Value Printed In Two Blocks Of Three Digits On Injector

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

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

Description of injector adjustment at end of instruction.

Fig 3: Identifying Injector Installation Position

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Installing injector:

Installation note: Install hold-down device (1) with curvature facing upwards.

Fig 4: Installing Hold-Down Device With Curvature

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Install injector (3). Install hold-down device (2).

IMPORTANT: Tighten screw hand-tight only so that holding-down element (2) is slack and if necessary injector can still be turned.

Connect contact plug (1).

Fig 5: Identifying Holding-Down Element And Plug

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NOTE: Make sure holding-down element (1) is correctly seated.

Fig 6: Identifying Holding-Down Element Correct Installation Position

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Copper seals (1) that may be fitted on the pressure lines are no longer needed and must be removed.

If using the pressure line, apply a light coating of gear oil to the thread. New lines are already pretreated.

Fig 7: Identifying Copper Seals

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Connect pressure line (1), tightening nuts hand-tight only in the process.

IMPORTANT: Connect pressure line (1) without tension only.
To ensure distortion-free installation of the pressure line and to avoid damaging the thread, it must be possible for both nuts to be screwed on easily by hand!
If the nuts cannot be screwed on easily by hand, the injector must if necessary be turned a little.

Fig 8: Connecting Pressure Line

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Turn injector (2) if necessary in direction of arrow until nuts on pressure line can be easily screwed on by hand.

Tighten nuts on pressure line hand-tight.

Then tighten down bolt for holding-down element (1).

Tightening torque 13 53 5AZ .

Fig 9: Turning Injector

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Adhere to tightening sequence:

First tighten down nut (1) on injector.
Then tighten down nut (2) on rail.

When tightening nut (1) on injector, grip hexagon head of injector with wrench (3).

Tighten down nuts with special tool 37 1 151.

Tightening torque 13 53 8AZ .

Fig 10: Tightening Nut On Injector

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