11 12 100 Removing and Installing Cylinder Head (N55)

Special Tools Required: 

• 11 0 320 .
• 11 4 420 .
• 11 4 430 .
• 11 4 471 .
• 11 4 472 .
• 11 8 580 .

Necessary Preliminary Tasks: 

• Remove Exhaust System. See COMPLETE EXHAUST SYSTEM and CATALYTIC CONVERTER .
• Drain COOLANT .
• Drain ENGINE OIL .
• Remove ENGINE .
• Mount Engine On ASSEMBLY STAND .
• Remove Intake PLENUM .
• Remove EXHAUST TURBOCHARGER with Integrated Exhaust Manifold.
• Detach Coolant Hoses From Cylinder Head.
• Remove INTAKE AND EXHAUST CAMSHAFT ADJUSTERS .

Release Screws (1).

Unclip Timing Chain Module (2) At Separation Point (3) and Remove Towards Top.

Set Down Timing Chain.

Fig 1: Identifying Timing Chain Module, Separation Point and Screws

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Release Screws (1).

Tightening torque 11 12 3AZ .

Release Screw (2).

Tightening torque 11 12 3AZ .

Fig 2: Identifying Screws

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Release Cylinder Head Bolts In Sequence 14 To 11 with Special Tool 11 4 420 .

Release Cylinder Head Bolts In Sequence 10 To 1 with Special Tool 11 8 580 .

Fig 3: Cylinder Head Bolts Tightening/Loosening Sequence (N55)

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Secure Special Tool 11 0 320 with Bolts (1).

Tightening torque 11 12 4AZ .

Fig 4: Securing Special Tool 11 0 320 with Bolts

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Insert Special Tool 11 4 430 Into Bore Holes.

Fig 5: Inserting Special Too 11 4 430 Into Bore Holes

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Remove Coarse Residues From Sealing Surfaces of Cylinder Head and Crankcase with Special Tool 11 4 471 .

Fig 6: Removing Coarse Residues From Sealing Surfaces Using Special Tool 11 4 471

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Remove Fine Residues On Sealing Surfaces with Special Tool 11 4 472 From Cylinder Head and Crankcase.

Clean All Blind Holes.

Replace CYLINDER HEAD GASKET .

Fig 7: Removing Residues On Sealing Surfaces Using Special Tool 11 4 472

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Fit New Cylinder Head Bolts.

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 .

Insert Bolts (1).

Tightening torque 11 12 3AZ .

Insert Bolt (2).

Tightening torque 11 12 3AZ .

Fig 8: Cylinder Head Bolts Tightening/Loosening Sequence (N55)

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Fig 9: Identifying Screws

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Assemble Engine.