11 34 715 Replacing all valve springs (N57 Diesel)

Special tools required: 

• 11 4 480 .
• 11 8 840 .
• 11 9 000 .
• 11 9 001 .
• 11 9 005 .
• 11 9 006 .
• 11 9 008 .
• 11 9 009 .
• 11 9 011 .

Necessary preliminary tasks: 

• Remove CYLINDER HEAD .

Mount cylinder head (1) on special tool 11 9 001 .

Fig 1: Mounting Cylinder Head On Special Tool (11 9 001)

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Remove all special tools 11 9 008 .

Fig 2: Identifying Special Tools (11 9 008)

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Position special tool 11 9 008 with straight surface on combustion chamber side of cylinder head (see Fig 3).

Fig 3: Positioning Special Tool (11 9 008)

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Insert special tool 11 9 006 .

Lock special tool 11 9 005 in direction of arrow.

Rotate cylinder head, using special tool 11 9 000 , 180° into installation position.

Fig 4: Rotating Cylinder Head Into Installation Position Using Special Tool (11 9 000)

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Align special tool 11 9 009 in direction of valve axis. Select corresponding groove in special tool 11 8 840 .

Press down valve spring on upper spring cup with special tool 11 9 009 .

Hook in with special tool 11 9 011 .

Fig 5: Preparing Special Tools

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Use a magnet to remove valve keys (1) from valve (2).

Remove valve spring and spring cup.

Place down valve springs and valve keys on special tool 11 4 480 in an orderly manner.

Fig 6: Removing Valve Keys From Valve

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Check color code of valve spring (1).

The color orange (2) on the valve spring is important for allocation purposes.

Mixed installation is possible.

Possible color sets:

• Yellow - orange
• Green - orange
• Blue - orange

The installation position of the valve spring can be freely selected.

Fig 7: Identifying Color Markings On Valve Spring

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Installation sequence:

1. Valve
2. Valve stem seal
3. Valve spring
4. Top spring cup
5. Valve keys
   Fig 8: Exploded View Of Valve

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If necessary, replace VALVE STEM SEALS .

Assemble engine.