Installing injector

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Installation of injector is described separately from removal.

Install injector (3).

Install hold-down device (2).

NOTE: Make sure hold-down device (2) is correctly seated.

Fig 1: Identifying Injector, Holding-Down Element And Screw

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IMPORTANT: Tighten screw (1) hand-tight only so that holding-down element (2) is slack and if necessary injector (3) can still be turned.

Install pressure line (2). Tighten nuts (1) manually only.

Fig 2: Identifying Pressure Line And Union Nuts

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IMPORTANT: Connect pressure line (2) 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 3: Turning Injector

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Turn injector (1) if necessary in direction of arrow until nuts on pressure line can be easily screwed on by hand.

Tighten nut (2) of pressure line hand-tight. Then tighten down bolt for hold-down device (3).

Tightening torque: see 5AZ in 13 53 FUEL INJECTION NOZZLES AND PIPES

Adhere to tightening sequence:

First tighten down pressure line on injector.
After this, tighten pressure line on rail.

Tighten down nut on injector with special tool (1) 13 0 161 and to torque (2). In so doing, grip hexagon head of injector with wrench (3).

Tightening torque: see 2AZ in 13 53 FUEL INJECTION NOZZLES AND PIPES

Fig 4: Tightening High-Pressure Fuel Line On Injector Using Torque Wrench And Special Tool 13 0 161

Courtesy of BMW OF NORTH AMERICA, INC.