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: Suspending Engine With Engine Crane From Lifting Eye

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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

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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.

Installation note:

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

Fig 3: Identifying Screws

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Release screw (1).

Fig 4: Identifying Screw

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Release cylinder head bolts with special tool 11 2 250 .

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

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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

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

Fig 7: Removing Coarse Gasket Remnants From Sealing Surfaces Using Special Tool (11 4 471)

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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 Gasket Remnants Using Special Tool (11 4 472)

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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!) .

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

Fig 9: Cylinder Head Bolts Tightening Sequence

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Tightening torque: 11 12 2AZ .

NOTE: Graphic shows camshafts removed.

Secure screws (1).

Tightening torque: 11 12 1AZ .

Fig 10: Identifying Screws

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Tighten bolt (1).

Tightening torque: 11 12 3AZ .

Fig 11: Identifying Screw

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Assemble engine.