11 34 552 Removing And Installing Or Replacing All Valves - Cylinder Head Removed (S54)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Preliminary tasks are described in 11 12 503 DISASSEMBLING AND ASSEMBLING CYLINDER HEAD - CYLINDER HEAD REMOVED (S54) .

Replace valve stem seals. Refer to 11 34 560 REPLACING ALL VALVE STEM SEALS - CYLINDER HEAD REMOVED (S50 / S54) .

Remove valves from cylinder head.

If necessary, check valve guide for wear. Refer to 11 12 595 CHECKING A VALVE GUIDE FOR WEAR - VALVE REMOVED (S50/S54) .

If necessary, remachine valve seat. Refer to 11 12 527 REMACHINING A VALVE SEAT - CYLINDER HEAD DISASSEMBLED (S50/S54) .

CAUTION: Incorrect installation possible. Incorrect installation will result in valve spring breakage.

The valve spring coils are narrower at the lower ends.

The color coding (3) is normally located at the lower end of the valve springs.

Only the position of the narrower coil is the decisive factor in correct installation of the valve springs (1 and 2).

Install valve springs (1 and 2) in such a way that lower coil points to spring plate at bottom.

Fig 1: Identifying Valve Springs

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Valve.
Lower plate spring.
Valve-stem seal.
Outer spring.
Inner spring.
Top spring plate.
Valve tapers.

Fig 2: View Of Valve Components
Courtesy of BMW OF NORTH AMERICA, INC.