11 12 100 Removing and installing cylinder head (N54, N54T)

Special tools required:

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

Necessary preliminary tasks

Remove ENGINE .
Remove INTAKE AND EXHAUST CAMSHAFT ADJUSTERS .

Release screws (1).

Unclip timing chain module (3) at junction (2) and remove towards top.

Set down timing chain.

IMPORTANT: If the timing chain is stowed in the gear case, the crankshaft must no longer be rotated.
This would cause the timing chain on the crankshaft sprocket to jam or jump.

Fig 1: Identifying Timing Chain Module, Junction And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

The timing chain is lifted out with a hook only during assembly.

NOTE: The lowest screw can only be released when the timing chain module is pressed forward slightly.

IMPORTANT: Secure the lowest screw with a gripper against falling down.

Release screws (1).

Tightening torque: 11 12 3AZ .

Fig 2: Identifying Timing Chain Module Screws

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Observe different bolt heads.

Release cylinder head bolts (1) M9 with special tool 11 4 420 .

Tightening torque: 11 12 2AZ .

Fig 3: Releasing Cylinder Head Bolts Using Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Release cylinder head bolts (1) M10 with special tool 11 8 580 from outside inwards.

Tightening torque: 11 12 1AZ .

IMPORTANT: All cylinder head bolts must be replaced.
Risk of damage!
Jointing torque and angle of rotation must be observed without fail.

Fig 4: Releasing Cylinder Head Bolts Using Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Washers (1) of cylinder head bolts can only be removed with a magnet (2) between cylinder head and bearing strip.

Fig 5: Identifying Cylinder Head Washer And Magnet

Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 0 320 with existing cylinder head cover bolts (1).

Tightening torque: 11 12 4AZ .

IMPORTANT: Removing and install cylinder head with a second person helping.
Weight of cylinder head with add-on parts is approx. 40 kg.
Do not set cylinder head down on sealing face, risk of damage to valves.

Fig 6: Securing Special Tool (11 0 320) To Cylinder Head