11 12 100 Removing and installing/sealing cylinder head (N16)

Special tools required:

IMPORTANT: Fit new cylinder head bolts.
Do not wash off bolt coating.
There must not be any coolant, water or oil present in the pocket holes (risk of corrosion and cracking ).

Necessary preliminary tasks:

Remove EXHAUST SYSTEM .
Drain COOLANT .
Drain ENGINE OIL .
Remove EXHAUST MANIFOLD .
Remove intake air MANIFOLD .
Remove OIL DIPSTICK .
Detach coolant hoses from cylinder head.
Remove CYLINDER HEAD COVER .
Remove INTAKE AND EXHAUST ADJUSTMENT UNIT .

NOTE: Remove and install cylinder head in installed state.

Suspend engine with engine crane (1) from lifting eye (2).

Fig 1: Identifying Engine Crane And Lifting Eye

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Remove and install cylinder head in installed state.
Move front panel into WORKING POSITION .

Release upper alternator screws, do not remove alternator.

Remove right engine mount.

Secure special tool 11 9 630 with standard bolts (1 and 2).

Fig 2: Securing Special Tool (11 9 630) With Standard Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

IMPORTANT: If the timing chain is stowed in the gear case, the crankshaft must no longer be rotated.
It is possible the timing chain may jam.

Fig 3: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

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

Release screw (1).

Fig 4: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release cylinder head bolts with special tool 11 2 250 .

Fig 5: Releasing Cylinder Head Bolts With Special Tool (11 2 250)

Courtesy of BMW OF NORTH AMERICA, INC.

Release cylinder head bolts from outside inwards (10 to 1).

NOTE: Remove washers with a magnet.
Shown without camshafts for purposes of clarity.

Fig 6: Cylinder Head Bolts Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 11 4 471 to remove coarse gasket remnants from sealing surfaces on cylinder head and on crankcase.

Fig 7: Removing Coarse Residues On Sealing Surfaces Using Special Tool (11 4 471)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove fine gasket remnants with special tool 11 4 472 .

There must not be any coolant, water or oil present in the pocket holes (risk of corrosion and cracking ).

Clean blind holes with a suitable tool.

Replace CYLINDER HEAD GASKET .

Fig 8: Removing Fine Residues On Sealing Surfaces Using Special Tool (11 4 472)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Fit new cylinder head bolts.
Do not wash off bolt coating.
Attach washers to cylinder head bolts.
Washers can drop into the engine (risk of damage! ).

Fig 9: Cylinder Head Bolts Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Secure cylinder head bolts from inside outwards (1 to 10).

Tightening torque: 11 12 2AZ .

NOTE: Illustration shows camshafts removed.

Secure screws (1).

Tightening torque: 11 12 1AZ .

Fig 10: Identifying Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten bolt (1).

Tightening torque: 11 12 3AZ .

Fig 11: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.