11 12 100 Removing and installing cylinder head (230i and 230i xDrive coupe/convertible)

Special tools required: 

• 11 8 580 
• 11 0 000 
• 11 9 000 
• 11 4 471 
• 11 4 472 
• 2 364 711 
• 11 4 470 
• 00 9 120 

Attention! 

When replacing the cylinder head: 

In all vehicles, the digital engine electronics (DME) must, if necessary, be reprogrammed/re-encoded after replacing  the cylinder head.

Read the vehicle I-level and proceed accordingly.

PuMA measure 62634754  must be observed.

For further information, see the applicable BMW parts catalogue

Attention! 

Replacing the cylinder head may cause damage on the valve gear due to a lack of engine oil.

It is imperative to observe REPAIR NOTES for the replacement of the cylinder head.

Attention! 

There must be no coolant, water or engine oil in any of the threaded holes in the engine block.

Fit new cylinder head bolts.

Do not wash off bolt coating.

Joining torque and angle of rotation must be observed without fail (risk of damage!  ).

Necessary preliminary work: 

• Refer to REMOVING CHARGE AIR LINE .
• Refer to REMOVING INTAKE PLENUM .
• Refer to REMOVING CATALYTIC CONVERTER .
• Refer to DRAINING OFF ENGINE OIL .
• Refer to REMOVING OIL RETURN LINE .
• Refer to REMOVING OIL FEED LINE .
• Refer to REMOVING COOLANT RETURNING LINE .
• Refer to REMOVING COOLANT FEED LINE .
• Refer to REMOVING INTAKE ADJUSTER AND EXHAUST CAMSHAFT ADJUSTER .

Removal: 

Unlock coolant line (1) and pull off.

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Unlock and pull off connectors (1 and 2).

Loosen the engine encapsulation (3) in the area of the cylinder head.

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Unclip cable (1) in marked area from acoustic cover (2).

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Release screws (1 - 3).

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Release screws (1).

Remove guide rail (2).

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Fix intake camshaft with an open-end spanner (1).

Release screw (2).

Remove the camshaft sensor wheel (3).

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Disassemble the roller tappet (1) from the high pressure pump bracket (3).

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Release screws (1).

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Use special tool 11 8 580  to slacken the cylinder head bolts.

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Release cylinder head bolts in sequence 10 to 1.

Remove cylinder head (1) and exhaust turbocharger using engine lifter and special tool 11 0 000  .

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Release bearing journal (1).

Remove guide rail (2) upwards.

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Installation: 

Close oil duct at front using special tool (B)  from tool set 2 364 711  .

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

Attention! 

Do not use any metal-cutting tools.

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

Attention! 

Do not use any metal-cutting tools.

There must be no coolant, water or engine oil in the pocket holes.

Risk of cracking and corrosion! 

Clean all blind holes.

Replace CYLINDER HEAD GASKET .

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Check fitting sleeves (1) for damage and correct installation position.

Clean sealing surfaces on the cylinder head and crankcase using special tool 11 4 470  .

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Attention! 

There must be no coolant, water and engine oil in any of the threaded holes in the engine block.

Fit new cylinder head bolts.

Do not wash off bolt coating.

Lightly oil screw head support.

Joining torque and angle of rotation must be observed without fail (risk of damage!  ).

Install guide rail (2) from the top.

Tighten bearing journal (1).

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Install cylinder head (1) and exhaust turbocharger using engine lifter and special tool 11 0 000  .

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Fit cylinder head and secure with new bolts, tightening in the sequence 1 to 10.

Tightening torque: 11 12 1AZ .

Secure cylinder head bolts (1) with special tool 00 9 120  and 11 8 580  .

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Install and tighten down screws (1).

Tightening torque: 11 12 2AZ .

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Mount the roller tappet (1) on the high pressure pump bracket (3).

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Fix intake camshaft with an open-end spanner (1).

Position the camshaft sensor wheel (3).

Tighten down screw (2).

Tightening torque 11 31 7AZ .

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Position acoustic cover.

Tighten screw (3).

Tightening torque 11 00 2AZ .

Tighten screw (2).

Tightening torque 11 00 2AZ .

Tighten screw (1).

Tightening torque 11 00 2AZ .

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Clip cable (1) into acoustic cover (2).

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Install guide rail (2).

Tighten the screws.

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Position engine encapsulation (3) correctly.

Connect connectors (1 and 2).

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Lock coolant line (1) and plug onto cylinder head.

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Required reworking: 

• Refer to INSTALLING INTAKE ADJUSTER AND EXHAUST CAMSHAFT ADJUSTER .
• Refer to INSTALLING INTAKE PLENUM .
• Refer to INSTALLING COOLANT FEED LINE .
• Refer to INSTALLING COOLANT RETURNING LINE .
• Refer to INSTALLING OIL FEED LINE .
• Refer to INSTALLING OIL RETURN LINE .
• Refer to INSTALLING CATALYTIC CONVERTER .
• Refer to INSTALLING CHARGE AIR LINE .
• Top up engine oil. Refer to ENGINE OIL CHANGE .

When replacing the cylinder head, the I-level must be encoded and programmed if necessary  .

• Connect diagnosis system and follow diagnosis instructions 
• Service functions
• Power train
• Engine electronics
• Reset VANOS adaptation values
• Encode and program I-level if necessary