11 34 715 Replacing all valve springs (N63)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required

Necessary preliminary tasks:

Remove left cylinder head.
Remove right cylinder head.
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: Attaching 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

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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: Identifying Valve Cotters

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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 Color Marking On Lower End Of Valve Spring

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Arrangement:

Valve
Valve stem seal with spring cup, bottom
Valve spring
Top spring cup
Valve keys

Assemble engine.

Fig 7: Identifying Valve, Valve Spring, Stem Seal, Keys And Top Spring Cup

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