Valve: Service and Repair

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.
- Remove valve springs.
- Remove valve stem seals.







Arrangement:
1. Intake valve 5 mm dia.
2. Valve stem seal with lower spring cup
3. Valve spring
4. Upper spring cup
5. Valve keys
If the valves are to be reused, they must be placed in neat order in special tool 11 4 481.







Arrangement:
1. Discharge valve 6 mm dia.
2. Valve stem seal with lower spring cup
3. Valve spring
4. Upper spring cup
5. 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.