11 12 100 Removing and installing cylinder head (N54)

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 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.

Fig 1: Identifying Timing Chain Module And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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.

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.

Fig 2: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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

Release screws (1).

Tightening torque 11 12 3AZ .

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 M9 With Special Tool (11 4 420)

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 .

Fig 4: Releasing Cylinder Head Bolts Using Special Tool (11 8 580)

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 5: Removing Cylinder Head Bolt Washer Using 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) With Bolts