BMW 7 Series: Valves With Springs

REMOVING AND INSTALLING/REPLACING ALL VALVES (N63)

Necessary preliminary work

• Remove LEFT CYLINDER HEAD.
• Remove RIGHT CYLINDER HEAD.
• Remove camshafts.

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

Fig. 284: Mounting Cylinder Head On Special Tool 11 9 000

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

Fig. 285: Preparing Special Tool 11 9 008 On Special Tool 11 9 006

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. 286: Sliding Locks In Direction Of Arrow And Pretension With Eccentric Shaft

Press down valve spring with special tool 11 8 840.

Fig. 287: Pressing Down Valve Spring With Special Tool 11 8 840

Remove valve cotters (1) with a magnet.

Place valve springs and valve keys on special tool 11 4 480 in an orderly manner.

Fig. 288: Identifying Valve Cotters

IMPORTANT: Incorrect assembly possible.

Install valve spring so that larger diameter points to spring plate at bottom.

Fig. 289: Dimensions Of Valve Spring

Arrangement:

Fig. 290: Exploded View Of Valve Assembly

1. Valve
2. Valve stem seal with spring cup, bottom
3. Valve spring
4. Top spring cup
5. Valve keys

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. 291: Preparing Special Tool 11 9 008 On Special Tool 11 9 006

Assemble engine.

• Replacing All Valve Springs (N63)
• Replacing All Valve Stem Seals (N63)

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