11 34 715 Replacing All Valve Springs (N55)

Special Tools Required: 

• 11 4 481 .
• 11 4 482 .
• 11 8 841
• 11 8 842
• 11 9 000 .
• 11 9 007 .

Necessary Preliminary Tasks: 

• Remove CYLINDER HEAD .
• Remove EXHAUST CAMSHAFT .
• Remove INTERMEDIATE LEVER .
• Remove INTAKE CAMSHAFT .
• Remove ROCKER ARM .

Place Cylinder Head On Special Tool 11 9 000 .

Align Special Tool 11 9 007 On Particular Combustion Chamber.

Fig 1: Aligning Special Tool 11 9 007 On Particular Combustion Chamber

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Position Special Tool 11 9 007 On Cylinder Head.

Push Locks (1 and 2) Toward Inside and Preload Via Eccentric Shaft.

Fig 2: Positioning Special Tool 11 9 007 On Cylinder Head and Pushing Locks Toward Inside

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Press Down Intake Valve  with Special Tool 11 8 841.

Fig 3: Pressing Down Intake Valve Using Special Tool 11 8 841

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Remove Valve Key (1) with A Magnet.

Remove Valve Spring with Spring Cups.

If Individual Components Are To Be Reused, They Must Be Placed In Neat Order In Special Tool 11 4 481 .

Fig 4: Removing Valve Key with Magnet

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Press Down Discharge Valve  with Special Tool 11 8 842.

Fig 5: Pressing Down Discharge Valve Using Special Tool 11 8 842

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Remove Valve Key (1) with A Magnet.

Remove Valve Spring with Spring Cups.

If Individual Components Are To Be Reused, They Must Be Placed In Neat Order In Special Tool 11 4 482 .

Fig 6: Removing Valve Key with Magnet

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Valve Springs Are Marked In Color (1).

Colors for Intake Valves:

• Green/Blue
• Yellow/Blue
  Fig 7: Locating Color Marking On Valve Spring

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Colors for Discharge Valves:

• Green/White
• Yellow/White

Install The Valve Spring So That The Larger Diameter Points To The Lower Spring Cup.

Arrangement:

1. Valve
2. Valve Stem Seal with Lower Spring Cup
3. Valve Spring
4. Upper Spring Cup
5. Valve Keys
   Fig 8: Exploded View of Valve

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Assemble Engine.

Check Function of DME; If Necessary, Readjust Uniform Mixture Distribution.