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 colour 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.