Removing the cylinder head

NOTE: RISK OF DAMAGE
Engine damage due to missing motor oil .
Missing motor oil following replacement of the cylinder head or the engine can lead to damage on the valve train .

After replacing the cylinder head or the engine, do not start the engine without observing the repair notes.
It is imperative you observe the repair notes for cylinder head or engine replacement.
For additional information, see: REPAIR NOTES FOR CYLINDER HEAD OR ENGINE REPLACEMENT .

Preliminary work

Refer to DISCONNECTING THE NEGATIVE BATTERY CABLE OF THE SYSTEM BATTERY .
Refer to REMOVING THE UPPER FIREWALL COVER PANEL .
Refer to REMOVING SUSPENSION CROSS-BRACE .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to SUCTIONING THE AIR CONDITIONING .
Refer to IF INSTALLED: PARTIALLY REMOVING THE ENGINE VENTILATION LINE .
Refer to REMOVING IGNITION COILS .
Refer to REMOVING ALL SPARK PLUGS .
Refer to REMOVING THE INTAKE MANIFOLD FOR INTAKE SILENCER HOUSING .
Refer to REMOVING INTAKE SILENCER HOUSING .
Refer to REMOVING THE REAR BULKHEAD .
Refer to REMOVING CLEAN AIR PIPE .
Refer to REMOVING THE LAMBDA OXYGEN SENSOR .
Refer to REMOVING THE OXYGEN SENSOR MONITOR .
Refer to REMOVING THE RIGHT REAR STRUT BRACE .
Refer to REMOVING FRONT CROSS CONNECTION .
Refer to REMOVING FAN COWL WITH ELECTRIC FAN .
Refer to REMOVING TANK VENT VALVE .
Refer to REMOVING THE INTAKE PLENUM .
Refer to REMOVING THE SERVOMOTOR FOR THE ECCENTRIC SHAFT .
Refer to REMOVING THE HIGH PRESSURE LINE BETWEEN THE RAIL AND THE HIGH PRESSURE PUMP .
Refer to REMOVING HIGH PRESSURE PUMP .
Refer to REMOVING BOTH ACTUATORS .
Refer to REMOVING INJECTORS .
Refer to REMOVING FRONT RIGHT WHEEL .
Refer to REMOVING THE FRONT RIGHT WHEEL ARCH COVER .
Refer to PARTIALLY REMOVING THE FRONT WHEEL ARCH COVER .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .
Refer to DRAINING THE COOLANT FROM THE COOLANT CIRCUIT .
Refer to REMOVING WASHER FLUID RESERVOIR .
Refer to REMOVING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to REMOVING THE CROSS STRUT WITH THE TORSION STRUT .
Refer to REMOVING THE CONNECTING SUPPORT FROM THE TUNNEL AT FRONT AND REAR .
Refer to REMOVING EXHAUST SYSTEM .
Refer to REMOVING FRONT HEAT SHIELD .
Refer to REMOVING HEAT SHIELD AT REAR .
Refer to REMOVING PROP SHAFT .
Refer to REMOVING CATALYTIC CONVERTER .
Refer to REMOVING EXHAUST TURBOCHARGER .
Refer to REMOVING THE CYLINDER HEAD COVER .
Refer to BLOCKING ENGINE IN TDC FIRING POSITION .
Refer to REMOVING CHAIN TENSIONER .
Refer to REMOVING RIGHT ENGINE MOUNT .
Refer to RELEASING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to RELEASING VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING THE VANOS CENTRAL VALVE OF THE INTAKE CAMSHAFT ADJUSTER .
Refer to REMOVING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING INTAKE ADJUSTER .
Refer to REMOVING EXHAUST CAMSHAFT ADJUSTER .
Refer to REMOVING THE TEST GAUGES FOR SECURING THE CAMSHAFTS .

CAUTION: Heavy component .
Heavy components can lead to injury or damage .

Remove and install heavy components with the aid of another person/other persons.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Loosen screws (1) .
Feed out coolant line (2) and place to one side.
Catch and dispose of leakage coolant.

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Unlock and detach the coolant line (1) at the cylinder head.
Catch and dispose of leakage coolant.
Unlock and disconnect the plug connection (2) on the coolant temperature sensor.

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Loosen screw (1) .
Guide out and remove holder (2) .

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Unlock the locking mechanism (1) .
Guide out and remove holder (2) .

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Feed out coolant line (1) and place to one side.

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Loosen screws (1) .
Guide out the wiring harness section (2) of sensor system 1 and set aside.
Loosen screw (3) .
Feed out ground cable (4) and set it aside.

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Loosen screws (1) .
Guide out and remove slide rail (2) .

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Unscrew the bearing journal (1) from the guide rail (2) .

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Affix the intake camshaft with a standard open-end wrench (1) .
Loosen screw (2) .
Remove the camshaft sensor wheel (3) .

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Loosen the cylinder head bolts in the sequence from (5) to (1) .

Fig 1: Cylinder Head Bolts Loosening Sequence
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Loosen the cylinder head bolts with the special tool 0 495 747 (11 8 580) .

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Loosen the cylinder head bolts in the sequence from (10) to (1) .

Fig 2: Cylinder Head Bolts Loosening Sequence
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Insert and position the special tool 2 459 012 at the cylinder head.

Tighten the screws (1) of the special tool 2 459 012 .

TIGHTENING TORQUE SPECIFICATIONS

Special tool to cylinder head
M8	Tightening torque	21.5 Nm

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NOTE: RISK OF DAMAGE
Damage to guide rails .
The application of great force can damage the guide rails of the timing chain .

When removing and installing the cylinder head, make sure that the cylinder head does not damage the guide rail.

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Guide out and remove the cylinder head (1) using the workshop crane and the special tool 0 490 561 (11 0 000) carefully .
Mount the cylinder head (1) on the special tool 0 494 362 (11 9 000) .

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