Version 2

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Size (1) 58 mm

Fig 1: Identifying Guide Block Dimension

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Necessary preliminary tasks:

Remove CYLINDER HEAD COVER
For E81, E82, E87, E88, E90, E91, E92, E93: Remove COWL PANEL COVER .

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Fig 2: Moving Eccentric Shaft

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NOTE: Oil spray nozzle must be removed from 3rd cylinder (make a note of installation position of oil spray nozzle).

Fig 3: Identifying Oil Spray Nozzle With Spray

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Position special tool 11 7 110 on return spring (1) (see arrows).

Fig 4: Positioning Special Tool (11 7 110) On Return Spring

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WARNING: Risk of injury in event of incorrect use.

IMPORTANT: Improper handling. Risk of damage!

Place special tool 11 7 110 flat on cylinder head.

Turn knurled screw (1) in direction of arrow until both clamping levers secure return spring in guide block.

Fig 5: Turning Knurled Screw

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Return spring is correctly preloaded when both clamping levers are parallel to guide block.

Fig 6: Identifying Special Tool (11 7 110)

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IMPORTANT: Risk of damage!

Left and right return springs (1) must be positioned in lateral guide of special tool 11 7 110 .

Fig 7: Positioning Return Spring

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Preload return spring with lever (1) on special tool 11 7 110 in direction of arrow.

Fig 8: Preloading Return Spring On Special Tool (11 7 110)

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Lock special tool 11 7 110 with catch on lever (1).

IMPORTANT: Screw fixing on return spring can only be released with special tool 11 7 110 secured.

Fig 9: Locking Special Tool (11 7 110) On Lever

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Release screw (1).

Fig 10: Releasing Screw

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WARNING: Risk of injury in event of incorrect use.
Lever (1) is under pre-tension.

IMPORTANT: Improper handling.
Risk of damage!

Secure lever (1)

Press back latching hook (2).

Return spring tension can now be released.

Fig 11: Pressing Latching Hook

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Release knurled screw (1) on special tool 11 7 110 in direction of arrow.

Fig 12: Releasing Knurled Screw On Special Tool (11 7 110)

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Release special tool 11 7 110 in direction of arrow from return spring (1).

Fig 13: Releasing Special Tool (11 7 110)

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Press torsion spring apart at positions (1).

Remove torsion spring towards top.

Fig 14: Removing Torsion Spring

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IMPORTANT: Uniform distribution must not be changed.
Place all components in clean and orderly condition in special tool 11 4 481.

All components must be reinstalled in the same positions in an engine which has already been in use.

Fig 15: Identifying Intermediate Lever Components On Special Tool

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Eccentric shaft with bearing
Bearing caps of eccentric shaft (set out in order)
Intake camshaft
Bearing caps of inlet camshaft (set out in order)
Intake valves with valve springs
Valve plates and valve cotters
Cam followers with HVCA elements (set out in order)
Torsion springs
Guide blocks (set out in order)
Intermediate levers (set out in order)

Release screws (1) on guide block (2).

Tightening torque 11 37 1AZ .

Place all guide blocks (2) in neat order in special tool 11 4 481.

Installation:

Mixing up the guide blocks (2) will cause the engine to suffer idle-speed fluctuations.

This will result in maladjustment of uniform distribution .

Fig 16: Identifying Screws On Guide Block

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Installation:

All contact surfaces (1) of guide block must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Fig 17: Identifying Contact Surface Of Guide Block

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Lift out intermediate levers (2).

Place all intermediate levers (2) in neat order in special tool 11 4 481.

Installation:

Mixing up the intermediate levers (2) will cause the engine to suffer idle-speed fluctuations.

Installation:

All contact surfaces (1) must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Fig 18: Identifying Contact Surface Of Guide Block

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All intermediate levers (1) are classified.

All intermediate levers (1) must be reinstalled in the same positions in an engine which has already been in use.

Fig 19: Locating Marking On Intermediate Levers

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IMPORTANT: Before installing intermediate levers (2), make sure cam followers are correctly positioned.
Risk of damage!

Install intermediate levers (2).

Fig 20: Identifying Contact Surface Of Guide Block And Intermediate Levers

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Fit guide block (2) cleanly into opening.

Tighten screws (1) hand-tight.

Check that intermediate levers are in correct installation position.

Release screws (1) by a 1/4 turn.

Fig 21: Identifying Guide Block And Screws

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Secure special tool 11 4 450 to screw fixing (1) of eccentric shaft.

Move eccentric lever (3) on special tool 11 4 450 in direction of arrow.

Guide block is now pretensioned.

Insert screws (2) of guide blocks.

Tightening torque 11 37 1AZ .

Installation:

At cylinder no. 3, the guide block can be pre-installed with one screw (internal) only.

Oil spray nozzle is fitted only after torsion spring has been installed.

Fig 22: Moving Eccentric Lever On Special Tool (11 4 450)

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Install torsion spring (2) on guide block.

Installation:

Insert torsion spring (2) in intermediate lever (1) (see arrow).

Check that cam follower (3) is in correct installation position.

Fig 23: Inserting Torsion Spring On Intermediate Lever

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Position special tool 11 7 110 on return spring.

Fig 24: Positioning Special Tool (11 7 110) On Return Spring

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Clamp return spring with knurled screw (1) in direction of arrow.

Fig 25: Compressing Return Spring With Knurled Screw

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Return spring (1) is positioned correctly when catches (see arrows) are surrounding return spring (1).

Fig 26: Positioning Return Spring

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WARNING: Risk of injury in event of incorrect use.

IMPORTANT: Improper handling.
Risk of damage!
Check return spring on intermediate lever to ensure correct installation position.

Press special tool 11 7 110 to stop in direction of arrow.

Fig 27: Pressing Special Tool (11 7 110)

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IMPORTANT: Pay attention to thread on cylinder head.
Risk of damage!

Tighten bolt (1).

Tightening torque 11 37 2AZ .

Fig 28: Tightening Bolt

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At cylinder no. 3, adjust oil spray nozzle (2) so that oil spray points precisely towards spline teeth (3).

Insert screw (1) with oil spray nozzle (2) (external).

Tightening torque 11 37 4AZ .

Fig 29: Identifying Oil Spray Nozzle With Spray

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Assemble engine.