11 00 050 Removing and installing engine (N52)

NOTE: Following procedure is for 3-Series and 5-Series. Specific Z4 information is not available from manufacturer. It is suggested to use 3-Series information.

Special tools required:

11 0 020

IMPORTANT: Aluminium-magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

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

The end faces of aluminium 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:

Lift engine hood into Assembly Position.
Remove exhaust system.
Remove Transmission.
Drain Engine Oil.
Disconnect Negative Battery Lead.
Remove Air Cleaner Housing.
Remove fan cowl with electric fan.
Remove Radiator.
Remove Water Pump.
Remove Thermostat.
Detach All Coolant Hoses from engine.
Remove Left And Right Fresh Air Duct.
Remove Intake Air Manifold.
Detach Vacuum Line From Brake Booster.
Unfasten Ignition Wiring Harness and lay to one side.
Unfasten Engine Wiring Harness and lay to one side.
Remove Fuel Injector Rail and place to one side.

Release A/C Compressor (1) and set down on front axle carrier.

IMPORTANT: A/C lines are pressurized.

Do not disconnect A/C lines.

Do not disconnect coolant pipe from crankcase.

Fig 1: Identifying A/C Compressor

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Do not disconnect hydraulic lines.

If Dynamic Drive optional extra is fitted, release bracket.

Fig 2: Identifying Power Steering Pump

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in towing hook (1).

Suspend special tool 11 0 020 from engine crane.

Suspend special tool 11 0 020 from the designated mounting eyelets (2) only.

Lift engine out with crane.

Fig 3: Identifying Special Tool (11 0 020), Towing Hook And Engine Mounting Eyelets

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: If automatic transmission optional extra is fitted: Raise engine approx. 10 cm.

Release screws (1).

Remove lines (2) with oil-water heat exchanger in direction of arrow.

Fig 4: Identifying Oil-Water Heat Exchanger Lines And Retaining Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME.