Removing and Installing Engine

11 00 050 Removing and installing engine (N54, N54T)

Special tools required:






Important!
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminium screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).






Necessary preliminary work:
- Disconnect battery negative lead
- Lift engine bonnet/hood into assembly position
- Drain off engine oil
- Remove air filter housing
- Remove cowl panel cover panel.
- Remove fan cowl with electric fan
- Remove radiator
- Remove expansion tank.
- Detach all coolant hoses from engine
- Release oil pipes from oil-to-water heat exchanger
- Remove alternator drive belt
- Remove air conditioning compressor
- Detach pressure pipe from both exhaust turbochargers
- Remove clean air pipe on left and right
- Remove intake plenum
- Detach vacuum line from brake servo
- Unfasten ignition wiring harness and lay to one side
- Release engine wiring harness from electronics box and lay to one side
- Remove exhaust system
- Remove catalytic exhaust-gas converters
- Remove output shafts (all-wheel drive vehicles only)
- Remove power steering pump
- Remove reinforcement plate (all-wheel drive vehicles only)
- Remove transmission
- Release grounding strap on left engine support arm






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.






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






Release screws (1) for A/C lines.






Disconnect fuel lines (1).

Seal fuel lines with special tool 13 5 281 and 13 5 282.

Detach vacuum line from engine mount.






Secure special tool 11 8 680 to lifting eye on gearbox side.

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).

Installation note:
Special tool 11 8 680 is mounted correctly if the locking balls (2) are locked.

Special tool 11 8 680 is firmly secured to lifting eye.






Attach special tool 11 0 000 to special tool 11 8 680 in eye (1).






Screw in towing hook (1).

Attach special tool 11 0 000 to engine crane.

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

Unscrew left and right engine mounts.

Remove left engine support arm.

Lift engine out with crane.






Installation note:
Fix special tool 11 7 310 onto steering box.






Assemble engine.

Observe following in case of exchange engine.

Check function of DME.