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Home >> BMW >> 2014 >> M6 2D Convertible, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1125 (Engine - Pistons, Piston Rings, Balancing Shafts, Rocker Arms, Intake / Exhaust Valves, Valve Springs, Valve Stem Seals, Variable Valve Lift Control System (VALVETRONIC) - Repair) >> Variable Valve Lift Control System (VALVETRONIC) >> N55 Engine >> 11 37 010 Removing and installing/replacing intermediate levers (N55)

11 37 010 Removing and installing/replacing intermediate levers (N55)

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Special tools required: 

WARNING: Risk of injury in event of incorrect use.
IMPORTANT: Improper handling. Risk of damage! 
IMPORTANT: Aluminum screws/bolts must be replaced each time they are released  .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic  .
Joining torque and angle of rotation must be observed without fail (risk of damage)  .

Necessary preliminary tasks: 

Slowly adjust eccentric shaft in direction of arrow to minimum stroke via the servomotor with a 4-mm hexagon socket wrench (2) and an open-end spanner (1).

IMPORTANT: Secure eccentric shaft with open-end spanner (1) (risk of return stroke).
Fig 1: Adjusting Eccentric Shaft To Minimum Stroke
G09845907Courtesy of BMW OF NORTH AMERICA, INC.

Release bolt (1) on the oil spray nozzle.

Tightening torque: 11 37 4AZ .

Unclip oil spray nozzle (2) from the bracket on the actuator drive (3) in direction of arrow.

Fig 2: Identifying Oil Spray Nozzle, Bolt, And Bracket
G09845908Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Positioning Special Tool (11 7 110) On Return Spring
G06900918Courtesy of BMW OF NORTH AMERICA, INC.
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 gate.

Fig 4: Turning Knurled Screw
G06900919Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 5: Identifying Preloaded Return Spring
G06900920Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Risk of damage!

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

Fig 6: Positioning Return Springs In Lateral Guide Of Special Tool (11 7 110)
G06900921Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 7: Preloading Return Spring On Special Tool (11 7 110)
G06900922Courtesy of BMW OF NORTH AMERICA, INC.

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

IMPORTANT: Screw connection on return spring can first be released with secured special tool 11 7 110 .
Fig 8: Locking Special Tool (11 7 110) With Catch On Lever
G06900923Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fig 9: Identifying Screw
G06900924Courtesy of BMW OF NORTH AMERICA, INC.
WARNING: Risk of injury in event of incorrect use.
Lever (1) is preloaded.
IMPORTANT: Improper handling. Risk of damage! 

Secure lever (1)

Press back latching hook (2).

Return spring tension can now be released.

Fig 10: Identifying Latching Hook And Lever
G06900925Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 11: Releasing Knurled Screw On Special Tool (11 7 110)
G06900926Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 12: Releasing Special Tool (11 7 110) From Return Spring
G06900927Courtesy of BMW OF NORTH AMERICA, INC.

Press return spring (1) apart.

Remove return spring (1) upward.

Fig 13: Removing Return Spring
G04751234Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Uniform distribution must not  be changed.
Place all components in clean and orderly  condition in special tool 11 4 481 .
Fig 14: Identifying Removed Engine Components Properly Arranged On Tray (11 4 481)
G04751235Courtesy of BMW OF NORTH AMERICA, INC.

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

  1. Eccentric shaft with bearing
  2. Bearing caps of eccentric shaft (set out in order)
  3. Intake camshaft
  4. Bearing caps of intake camshaft (set out in order)
  5. Intake valves with valve springs
  6. Valve heads and valve keys
  7. Rocker arms with HVCA elements (set out in order)
  8. Return springs.
  9. Gates (set out in order)
  10. Intermediate levers (set out in order)

Release screws (1) on gate (2).

Tightening torque 11 37 1AZ .

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

Installation note: 

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

This will result in maladjustment of uniform distribution  .

Fig 15: Identifying Screws On Gate
G06900930Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

Fig 16: Identifying Contact Surfaces Of Gates
G04751237Courtesy of BMW OF NORTH AMERICA, INC.

Lift out intermediate levers (1).

Place all intermediate levers (1) in neat order in special tool 11 4 481 .

Installation note: 

Mixing up the intermediate levers (1) will cause the engine to suffer idle-speed fluctuations.

Installation note: 

All contact surfaces must be clean and free of oil and grease. If necessary, clean contact surfaces.

Fig 17: Identifying Intermediate Lever
G09845782Courtesy of BMW OF NORTH AMERICA, INC.

All intermediate levers are classified.

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

Intermediate levers are classified from 1 to 5.

Fig 18: Locating Classification Number On Intermediate Lever
G09845924Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Before installing intermediate levers (1), make sure rocker arms are correctly positioned.
Risk of damage! 
Fig 19: Identifying Roller Cam Follower
G09845542Courtesy of BMW OF NORTH AMERICA, INC.

Install intermediate levers (1).

Fig 20: Identifying Intermediate Lever
G09845782Courtesy of BMW OF NORTH AMERICA, INC.

Fit gate (2) cleanly into recess.

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 Gate And Screws
G04751236Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 4 450 on screw connection (1) of eccentric shaft and set adjusting screw on special tool 11 4 450 if necessary.

Turn eccentric lever on special tool 11 4 450 in direction of arrow.

Gate is now preloaded.

Insert screws (1) of gates.

Tightening torque 11 37 1AZ .

Fig 22: Turning Eccentric Lever
G09845928Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

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

Press return spring (1) apart.

Install return spring (1).

Fig 23: Removing Return Spring
G04751234Courtesy of BMW OF NORTH AMERICA, INC.

Install return spring (2) on gate.

Installation note: 

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

Check that rocker arm (3) is in correct installation position.

Fig 24: Identifying Throttle Return Spring, Intermediate Lever, And Roller Cam Follower
G04751243Courtesy of BMW OF NORTH AMERICA, INC.

Position special tool 11 7 110 on return spring.

Fig 25: Releasing Special Tool (11 7 110) From Return Spring
G06900927Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 26: Clamping Throttle Return Spring With Knurled Screw
G09845932Courtesy of BMW OF NORTH AMERICA, INC.

Return spring (1) is positioned correctly when latching hooks surround return spring (1).

Fig 27: Positioning Return Spring
G09845933Courtesy of BMW OF NORTH AMERICA, INC.
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 28: Pressing Special Tool (11 7 110)
G09845934Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Pay attention to thread on cylinder head. Risk of damage! 

Tighten bolt (1).

Tightening torque 11 37 2AZ .

Fig 29: Identifying Screw
G06900924Courtesy of BMW OF NORTH AMERICA, INC.

Retract oil spray nozzle (2) on actuator drive (3).

Engage bolt (1) and release back to 90°.

For exact positioning of the oil spray nozzle (2) audibly clip it in at the top.

Tightening torque 11 37 4AZ .

Fig 30: Identifying Oil Spray Nozzle, Bolt, And Bracket
G09845908Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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