11 00 050 Removing and installing engine (N55)

Special tools required:

11 0 000
11 7 310
11 8 680
13 5 281
13 5 282

Necessary preliminary tasks:

Disconnect NEGATIVE BATTERY LEAD .
MOVE engine compartment lid into service position.
Remove both TRAILING LINKS .
REMOVE capacitor
Remove MANIFOLD .
Remove CLEAN AIR PIPE .
Remove CATALYTIC CONVERTER .
Remove TRANSMISSION .
Remove front output shafts . See 31 60 003 REMOVING AND INSTALLING/REPLACING LEFT OUTPUT SHAFT or 31 60 004 REMOVING AND INSTALLING/REPLACING RIGHT OUTPUT SHAFT (AWD only).
Remove RADIATOR .
Detach all coolant hoses from engine.
Detach vacuum line from brake booster.
Unfasten engine wiring harness . See 12 51 100 REPLACING WIRING HARNESS SECTION FOR IGNITION AND INJECTORS (N55) or 12 51 001 REPLACING WIRING HARNESS SECTION FOR ENGINE (N55) and lay to one side.

To remove or install the engine, the towing hook 72 15 8 108 670 is required.

Fig 1: Identifying Towing Hook (72 15 8 108 670)

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Support engine with special tool 11 7 310 on steering box.

Fig 2: Supporting Engine Using Special Tool 11 7 310 On Steering Box

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Detach right pressure pipe (1) from charge air cooler.

Fig 3: Identifying Right Pressure Pipe

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Remove circlip (1).

Unlock and disconnect fuel lines (2 and 3).

Fig 4: Identifying Fuel Lines And Circlip

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Close off fuel line (3) with special tool 13 5 281 .

Close off fuel line (2) with special tool 13 5 282 .

Fig 5: Identifying Fuel Line And Special Tool (13 5 281)

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Release power steering pump (1) and set down on front axle support.

NOTE: Do not disconnect hydraulic lines.
Shown without air conditioning compressor for purposes of clarity.

Fig 6: Identifying Power Steering Pump

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Mount special tool 11 8 680 on rear lifting eye (transmission side).

Push ball lock pin (1) in direction of arrow and hold down until special tool 11 8 680X is positioned in lifting eye.

Pull ball lock pin (1) outward in direction of arrow until both balls (2) are pushed outward.

Installation note:

For checking correct installation of special tool 11 8 680.

There must be a 6.5 mm gap between ball lock pin (1) and ball lock pin housing.

The gap dimension can be checked using a 6.5 mm drill.

Fig 7: Identifying Locking Pin & Locking Balls

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Attach special tool 11 0 000 to engine crane.

Suspend special tool 11 0 000 from the designated mounting eyelets of special tool 11 8 680 only (see arrow).

Fig 8: Attaching Special Tool 11 0 000 To Engine Crane

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Release nut (1) on earth strap.

Fig 9: Identifying Nut On Earth Strap

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Release both engine mounts.

Unscrew nuts (1).

Installation note:

Replace self-locking nut.

Tightening torque: 22 11 2AZ .

Fig 10: Identifying Self-Locking Nut

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Screw towing eye into cylinder head.

Tightening torque: 11 12 5AZ .

Suspend special tool 11 0 000 from the designated mounting eyelets (1) only.

Lift engine out with engine crane.

Fig 11: Lifting Engine Using Special Tool (11 0 000)

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Assemble engine.

Check function of DME.