11 12 100 Removing and installing cylinder head (B48, B46)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT:

When replacing the cylinder head:

For all B46 and B48 engines made before 11/2015, the DME must be reprogrammed after replacing the cylinder head.

NOTE:

When replacing cylinder head:

The complete valve timing and the Valvetronic servomotor are already preassembled.

IMPORTANT:

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

Fit new cylinder head bolts.

Do not wash off screw coating.

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

Preliminary work needed:

Remove FAN COWL
Remove INTAKE PLENUM
Drain COOLANT
Remove TURBOCHARGER
Remove INTAKE AND EXHAUST CAMSHAFT ADJUSTERS
Remove right ENGINE MOUNT

Removal:

Unlock coolant line (1) and detach.

Unclip the coolant line (1) from the holder.

Fig 1: Coolant Line

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Release bearing journal (1).

Remove guide rail (2).

Remove screw (3).

Remove holder (4).

Fig 2: Bearing Journal, Guide Rail, Screw, And Holder

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Unscrew the screws (1).

Remove guide rail (2).

Fig 3: Locating Guide Rail And Screws

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Secure intake camshaft with an open-end wrench (1).

Release screw (2).

Remove sensor wheel (3).

Fig 4: Securing Intake Camshaft With Open-End Spanner

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

Fig 5: Roller Tappet And High Pressure Pump Bracket

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Unscrew the screws (1).

Fig 6: Locating Screws

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

Fig 7: Loosening/Tightening Cylinder Head Bolts Using Special Tool

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Release the cylinder head bolts in the sequence 10 to 1.

Remove cylinder head.

Remove the cylinder head gasket.

Fig 8: Cylinder Head Bolts Loosening/Tightening Sequence

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Installation:

NOTE: Before cleaning the sealing surfaces with the special tools 11 4 471 and 11 4 472 the rising pipes of oil ducts must be closed.

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

Fig 9: Closing-Off Oil Duct Using Special Tool

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IMPORTANT: Do not use any metal-cutting tools (e.g. emery cloth) to clean the sealing surface!

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

Fig 10: Removing Coarse Residues On Sealing Surfaces

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

IMPORTANT:

Do not use any metal-cutting tools (e.g. emery cloth).

There must be no coolant, water or motor oil in the pocket holes (risk of cracking and corrosion!).

Fig 11: Removing Fine Residues On Sealing Surfaces

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Clean all blind holes.

Replace cylinder head gasket. Check lining sleeves (1) for damage and correct installation position.

Fig 12: Locating Lining Sleeves

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IMPORTANT:

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

Fit new cylinder head bolts.

Do not wash off screw coating.

Lightly oil screw head support.

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

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

Tightening torque: 11 12 1AZ .

Fig 13: Cylinder Head Bolts Loosening/Tightening Sequence

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

Fig 14: Loosening/Tightening Cylinder Head Bolts Using Special Tool

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Install and tighten down screws (1).

Tightening torque: 11 12 2AZ .

Fig 15: Locating Screws

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

Fig 16: Roller Tappet And High Pressure Pump Bracket

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Secure intake camshaft with an open-end wrench (1).

Position sensor wheel (3).

Tighten down screw (2).

Tightening torque 11 31 7AZ .

Fig 17: Securing Intake Camshaft With Open-End Spanner

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NOTE: Replace bearing journals.

Position holder (4) on cylinder head.

Tighten screw (3).

Install guide rail (2).

Tighten bearing journal (1).

Tightening torque 11 31 3AZ .

Fig 18: Bearing Journal, Guide Rail, Screw, And Holder

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Install guide rail (2).

Tighten the screws.

Fig 19: Locating Guide Rail And Screws

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Connect coolant line (1) and clip in.

Fig 20: Coolant Line

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Required follow-up work:

Add COOLANT
Check engine for tightness