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

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

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 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 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: Removing M9 Cylinder Head Bolts Using 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 .

IMPORTANT: All cylinder head bolts must be replaced.

Risk of damage!

Jointing torque and angle of rotation must be observed without fail.

Fig 4: Removing M10 Cylinder Head Bolts Using Special Tool 11 8 580

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: 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: Installing Cylinder Head Cover Using Special Tool 11 0 320

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Set down cylinder head with intake and exhaust camshafts on side only, risk of damage to valves (1).

Fig 7: Identifying Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Insert 11 4 430 special tool into bore holes.

Fig 8: Inserting Special Tool 11 4 430 Into Bore Holes

Courtesy of BMW OF NORTH AMERICA, INC.

Remove coarse residues on sealing surfaces with special tool 11 4 471 from cylinder head and crankcase.

IMPORTANT: Do not use any metal-cutting tools.

Fig 9: Removing Coarse Residues On Sealing Surfaces Using Special Tool 11 4 471

Courtesy of BMW OF NORTH AMERICA, INC.

Remove fine residues on sealing surfaces with special tool 11 4 472 from cylinder head and crankcase.

IMPORTANT: Do not use any metal-cutting tools.

Fig 10: Removing Fine Residues On Sealing Surfaces Using Special Tool 11 4 472

Courtesy of BMW OF NORTH AMERICA, INC.

There must be no fluids or contaminants in any of the threaded holes (1) for the cylinder head bolt connections.

Risk of cracking and corrosion!

Clean all threaded holes.

Installation note:

Replace CYLINDER HEAD GASKET .

Fig 11: Identifying Threaded Holes

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Observe sequence for tightening cylinder head bolts without fail.

Installation note:

Fit new cylinder head screws.

Insert cylinder head bolts (1 to 10) with special tool 11 8 580 .

Tightening torque 11 12 1AZ .

Insert cylinder head bolts (11 to 14) with special tool 11 4 420 .

Tightening torque 11 12 2AZ .

Fig 12: Cylinder Head Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Graphic shows intake and exhaust camshafts removed.

Observe sequence for tightening cylinder head bolts without fail

IMPORTANT: The 2nd angle of rotation relates only to cylinder head bolts 1 to 10.

Installation note:

Jointing torque:

All cylinder head bolts 1 to 14 to 30 Nm

1st angle of rotation:

All cylinder head bolts 1 to 14 to 90°

2nd angle of rotation:

Only cylinder head bolts 1 to 10 to 90°

3rd angle of rotation:

All cylinder head bolts 1 to 14 to 45°

Installation note:

Replace screws (1).

Tightening torque 11 12 3AZ .

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

Fig 13: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.