11 34 552 Removing and installing or replacing all valves (N12)

Necessary preliminary tasks: 

• Remove CYLINDER HEAD .
• Remove INTERMEDIATE LEVER .
• Remove ECCENTRIC SHAFT .
• Remove INLET CAMSHAFT .
• Remove EXHAUST CAMSHAFT .
• Remove ROLLER CAM FOLLOWER .
• Remove VALVE SPRINGS .
• Remove VALVE STEM SEALS .

Arrangement:

1. Valve
2. Valve stem seal with spring plate, bottom
3. Valve spring
4. Top plate spring
5. Valve tapers

If the valves are to be reused, set then down in special tool 11 4 480 in a tidy and orderly fashion.

Fig 1: Exploded View Of Valve Assembly

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.