11 00 050 Removing and Installing Engine (N54)

Special tools required:

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

IMPORTANT:

Aluminum screws/bolts must be replaced each time they are released .

The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Disconnect negative battery lead.
Lift engine hood into assembly position. (See 51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET and/or 51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET )
Drain engine oil.
Remove air cleaner housing. (See 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N54) )
Remove fan cowl with electric fan.
Remove radiator.
Detach all coolant hoses from engine.
Remove left and right fresh air duct. (See 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME and/or 51 71 371 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON LEFT OR RIGHT SPRING STRUT DOME )
Remove intake air manifold. (See 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N54) )
Detach vacuum line from brake booster.
Unfasten ignition wiring harness and lay to one side. (See 12 51 100 REPLACING WIRING HARNESS SECTION FOR IGNITION COIL (N54) )
Unfasten engine wiring harness and lay to one side. (See 12 51 100 REPLACING WIRING HARNESS SECTION FOR IGNITION COIL (N54) )
Remove exhaust system.
Remove transmission.

Support engine with special tool 11 7 310 on steering gear. (See 11 7 310 SPACER )

Fig 1: Identifying Special Tool (11 7 310)

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Evacuate A/C system.

Release screws (1) for A/C lines.

Disconnect plug connection (2) on A/C compressor.

Do not remove A/C compressor.

Fig 2: Identifying Plug Connection On A/C Compressor & Screw

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Release bolts (1 and 2) from power steering pump bracket.

Set power steering pump down on front axle carrier.

NOTE:

Do not disconnect hydraulic lines.

If Dynamic Drive optional extra is fitted, release bracket.

Fig 3: Identifying Bolts From Power Steering Pump Bracket

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Disconnect fuel lines (1 and 2).

Seal off fuel line (1) with special tool 11 5 281.

Seal off fuel line (2) with special tool 11 5 282.

Fig 4: Identifying Special Tool (13 5 281) & (13 5 282)

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Secure special tool 11 8 680 to lifting eye on transmission side. (See 11 8 680 ADAPTER )

Press locking pin (1) in direction of arrow until locking balls (2) are loose.

Secure special tool 11 8 680 to lifting eye, release locking pin (1). (See 11 8 680 ADAPTER )

Installation:

Special tool 11 8 680 is correctly installed when locking balls (2) are arrested. (See 11 8 680 ADAPTER )

Special tool 11 8 680 is firmly secured to lifting eye. (See 11 8 680 ADAPTER )

Fig 5: Identifying Locking Pin & Locking Balls

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Suspend special tool 11 0 000 from special tool 11 8 680 in eye (1). (See 11 8 680 ADAPTER )

Fig 6: Identifying Special Tool (11 8 680)

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Screw in towing hook (1).

Suspend special tool 11 0 000 from engine crane.

Suspend special tool 11 0 000 from the designated mounting eyelets (2) only.

Unscrew left and right engine mounts.

Lift engine out with crane.

Fig 7: Identifying Special Tool (11 0 000) & (11 8 680)

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Installation:

Secure special tool 11 7 310 to steering gear. (See 11 7 310 SPACER )

Fig 8: Identifying Special Tool (11 7 310)

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Assemble engine.

Check function of DME.