11 34 552 Removing and installing/replacing all valves (N63)

Necessary preliminary tasks: 

1. Remove left cylinder head.
2. Remove right cylinder head.
3. Remove all CAMSHAFTS .

Mount cylinder head (1) on special tool 11 9 000 .

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

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Prepare special tool 11 9 008 on special tool 11 9 006 .

Fig 2: Preparing Special Tool 11 9 008 On Special Tool 11 9 006

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

Slide locks (1) in direction of arrow and pretension with eccentric shaft.

Fig 3: Sliding Locks In Direction Of Arrow And Pretension With Eccentric Shaft

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Press down valve spring with special tool 11 8 840 .

Fig 4: Identifying Valve Cotters

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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: Identifying Color Marking On Valve Spring

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IMPORTANT:

Incorrect assembly possible.

Incorrect assembly will result in valve spring breakage.

Color marking (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 plate at bottom.

Fig 6: Identifying Valve, Valve Stem Seal, Keys, Spring And Top Plate Spring

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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: Pressing Special Tool 11 6 370 Onto Valve Stem Seal

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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.

Assemble engine.

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

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