11 34 552 Removing and installing/replacing all valves (N55)

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Special tools required:

11 4 481 .
11 4 482 .

Necessary preliminary work:

Remove CYLINDER HEAD .
Remove INTERMEDIATE LEVER .
Remove ECCENTRIC SHAFT .
Remove INTAKE CAMSHAFT .
Remove EXHAUST CAMSHAFT .
Remove ROCKER ARM .
Remove VALVE SPRINGS .
Remove VALVE STEM SEALS .

Arrangement:

Intake valve 5 mm dia.
Valve stem seal with lower spring cup
Valve spring
Upper spring cup
Valve keys

If the valves are to be reused, they must be placed in neat order in special tool 11 4 481 .

Fig 1: Exploded View Of Intake Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Discharge valve 6 mm dia.
Valve stem seal with lower spring cup
Valve spring
Upper spring cup
Valve keys

If the valves are to be reused, they must be placed in neat order in special tool 11 4 482 .

Fig 2: Exploded View Of Intake Valve

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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