11 34 552 Removing and installing/replacing all valves (N63) (X6 xDrive 50i)

Special tools required:

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

Necessary preliminary tasks:

Remove LEFT CYLINDER HEAD .
Remove RIGHT CYLINDER HEAD .
Remove camshafts. Refer to 11 31 032 REMOVING AND INSTALLING/REPLACING LEFT INTAKE CAMSHAFT (N63O1) REP-REP-RAF1511N63O1-1131032 - V.4 (X6 XDRIVE 50I) , 11 31 034 REMOVING AND INSTALLING/REPLACING RIGHT INLET CAMSHAFT (N63) REP-REP-RAF1511N63O1-1131034 - V.4 (X6 XDRIVE 50I) , 11 31 036 REMOVING AND INSTALLING/REPLACING LEFT EXHAUST CAMSHAFT (N63O1) REP-REP-RAF1511N63O1-1131036 - V.4 (X6 XDRIVE 50I) and 11 31 038 REMOVING AND INSTALLING/REPLACING RIGHT EXHAUST CAMSHAFT (N63O1) REP-REP-RAF1511N63O1-1131038 - V.4 (X6 XDRIVE 50I) .
Remove the intermediate shaft. Refer to 11 37 006 REMOVING AND INSTALLING/REPLACING LEFT ECCENTRIC SHAFT (N63) REP-REP-RAF1511N63O1-1137006 - V.4 (X6 XDRIVE 50I) and 11 37 008 REMOVING AND INSTALLING/REPLACING RIGHT ECCENTRIC SHAFT (N63) REP-REP-RAF1511N63O1-1137008 - V.4 (X6 XDRIVE 50I) .

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

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Prepare 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 shaft.

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Press down valve spring with 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.

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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.

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Arrangement:

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

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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.

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Assemble engine.