11 34 552 Removing and installing/replacing all valves (N55)
Special tools required:
Necessary preliminary tasks:
- Remove CYLINDER HEAD .
- Remove INTERMEDIATE LEVER .
- Remove ECCENTRIC SHAFT .
- Remove INTAKE CAMSHAFT .
- Remove EXHAUST CAMSHAFT .
- Remove rocker arm. See 11 33 050 REMOVING AND INSTALLING/REPLACING ALL ROCKER ARMS (N55) .
- 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 .
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 .
Assemble engine.
Check function of Digital Engine Electronics; if necessary, readjust uniform mixture distribution.