11 00 050 Removing and installing engine (N55)

Special tools required:

Necessary preliminary tasks:

Disconnect NEGATIVE BATTERY LEAD .
MOVE engine compartment lid into service position.
Remove cowl panel cover. See 51 13 115 REMOVING AND INSTALLING/REPLACING COWL PANEL COVER .
Remove TRAILING LINKS .
Remove INTAKE PLENUM .
Remove CLEAN AIR PIPE .
Draw off A/C SYSTEM .
Remove the CATALYTIC CONVERTER .
Remove transmission. See 28 00 001 REMOVING AND INSTALLING TWIN-CLUTCH GEARBOX (GS7D36SG) (N55) or 23 00 028 REMOVING AND INSTALLING TRANSMISSION (GS6-45BZ) (N54T, N55) .
Remove front output shafts (AWD only).
Drain ENGINE OIL .
Loosen the ENGINE OIL PIPE on the engine oil cooler.
Remove FAN COWL with electric fan.
Remove RADIATOR .
Remove EXPANSION TANK .
Detach all coolant hoses from engine.
Detach vacuum line from brake booster.
Unfasten ENGINE WIRING HARNESS and lay to one side.
Release ground cable from engine support arm.

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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Release screws (1, 2).

Remove heater end panel (3).

Installation note:

Make sure heater end panel is correctly seated.

M6x20 bolt must be fitted in middle.

Fig 2: Identifying Heater End Panel And Screws

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

Fig 3: Identifying Special Tool (11 7 310) On Steering Box

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Release screws (1) of A/C lines and disconnect.

Do not remove air conditioning compressor.

Fig 4: Identifying Screws Of A/C Lines

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

Fig 5: Identifying Pressure Pipe From Charge Air Cooler

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Release screws (1).

Remove the protective plate (2).

NOTE: Graphic (all-wheel drive vehicle).

Fig 6: Identifying Protective Plate And Screws

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Unlock and detach fuel and tank ventilation line (1).

Detach vacuum hose (2) for engine mount.

Fig 7: Identifying Fuel And Tank Ventilation Lines

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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 8: Identifying Power Steering Pump

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Attach special tool 11 8 680 to rear lifting eye (gearbox side).

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

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

Installation note:

Checking the correct installation of the 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 9: Pushing Ball Lock Pin

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Attach special tool 11 0 000 to engine lifter.

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

Fig 10: Identifying Special Tool (11 8 680)

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Release nut on engine mount on left and right.

Unscrew nuts (1).

Installation note:

Replace self-locking nuts.

Tightening torque: 22 11 2AZ .

Fig 11: Identifying Nuts Of Cross Member

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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 lifter.

Fig 12: Lifting Engine Using Special Tool (11 0 000)

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Assemble engine.

Check function of DME.