11 34 552 Removing and Installing/Replacing All Valves (N63O1)

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Special Tools Required:

Necessary Preliminary Tasks:

Remove LEFT CYLINDER HEAD .
Remove RIGHT CYLINDER HEAD .
Remove Camshafts. See Procedures for:
- LEFT EXHAUST CAM ,
- LEFT INLET CAM ,
- RIGHT INLET CAM , and
- RIGHT EXHAUST CAM .
Remove The Intermediate Shaft. See LEFT ECCENTRIC SHAFT or RIGHT ECCENTRIC SHAFT .

Mount Cylinder Head (1) On Special Tool 11 9 001 . Graphic Shows Engine N63.

Fig 1: Mounting Cylinder Head On Special Tool 11 9 000

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Prepare Special Tool 11 9 008 .

Fig 2: Mounting Cylinder Head On Special Tool 11 9 001 and Preparing Special Tool 11 9 008

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Position Special Tool 11 9 006 with Silicone Cushion On Cylinder Head.

Slide Lock 11 9 005 In Direction of Arrow and Pretension with Eccentric Shaft.

Fig 3: Positioning Special Tool 11 9 006 with Silicone Cushion On Cylinder Head and Sliding Lock 11 9 005

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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: Place Valve Springs and Valve Keys On Special Tool 11 4 480

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IMPORTANT: Incorrect Assembly Possible.
Incorrect Assembly Will Result In Valve Spring Breakage.
Color Coding (1) Is Normally On Lower End of Valve Spring.
Only The Diameter Is Decisive for The Correct Installation of The Valve Springs.
Install Valve Spring So That Larger Diameter Points To Spring Cup At Bottom.

Fig 6: Locating Color Marking On Valve Spring

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Arrangement:

Valve
Valve Stem Seal with Spring Cup, Bottom
Valve Spring
Top Spring Cup
Valve Keys

Fig 7: Exploded View of Valve
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Release Special Tool 11 9 006 From Cylinder Head.

Remove All Valves and Place On Special Tool 11 4 480 In An Orderly Manner.

Fig 8: Preparing Special Tool 11 9 008 On Special Tool 11 9 006

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Assemble Engine.