11 34 715 Replacing all valve springs (N63O1)

Special tools required: 

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

Necessary preliminary work: 

• Remove LEFT CYLINDER HEAD .
• Remove RIGHT CYLINDER HEAD .
• Remove camshafts. See 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INTAKE CAMSHAFT (N63O1) , 11 31 036 REMOVING AND INSTALLING/REPLACING LEFT EXHAUST CAMSHAFT (N63O1) , 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N63O1)  and 11 31 038 REMOVING AND INSTALLING/RENEWING RIGHT EXHAUST CAMSHAFT (N63O1) .
• Remove eccentric shafts. See 11 37 006 REMOVING AND INSTALLING/REPLACING LEFT ECCENTRIC SHAFT (N63O1)  and 11 37 008 REMOVING AND INSTALLING/REPLACING RIGHT ECCENTRIC SHAFT (N63O1) .

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

Illustration shows N63.

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

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Prepare special tool 11 9 008 .

Fig 2: Identifying Special Tool 11 9 008

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Position special tool 11 9 006 with silicone cushion on cylinder head.

Move the lock 11 9 005 in direction of arrow and pre-tension with eccentric.

Fig 3: Moving Lock

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Press down valve spring with special tool 11 8 840 .

Fig 4: Pressing Down Valve Spring Using Special Tool 11 8 840

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Remove valve cotters (1) with a magnet.

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

Fig 5: Removing Valve Cotters

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Fig 6: Identifying Valve Spring Color Marking

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Arrangement:

1. Valve
2. Valve stem seal with spring cup, bottom
3. Valve spring
4. Top spring cup
5. Valve keys
   Fig 7: Identifying Valve Stem Seal, Valve Spring, Top Spring Cup, Valve Keys

   Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.