Necessary preliminary work

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Remove LEFT CYLINDER HEAD .
Remove RIGHT CYLINDER HEAD .
Remove camshafts. See LEFT INLET CAMSHAFT ; RIGHT INLET CAMSHAFT ; LEFT EXHAUST CAMSHAFT ; and RIGHT EXHAUST CAMSHAFT .

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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Courtesy of BMW OF NORTH AMERICA, INC.

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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Courtesy of BMW OF NORTH AMERICA, INC.

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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Courtesy of BMW OF NORTH AMERICA, INC.

Press down valve spring with special tool 11 8 840 .

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

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Courtesy of BMW OF NORTH AMERICA, INC.

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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Courtesy of BMW OF NORTH AMERICA, INC.

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: Dimensions Of Valve Spring

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Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Fig 7: Exploded View Of Valve Assembly

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Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.