Valve: Service and Repair

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





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 cam followers
^ Remove valve springs
^ Remove valve stem seals

Arrangement:
1) Intake valve 5 mm dia.





2) Valve stem seal with lower spring plate
3) Valve spring
4) Upper spring plate
5) Valve keys
If 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 plate
3) Valve spring
4) Upper spring plate
5) Valve keys
If valves are to be reused, they must be placed in neat order in special tool 11 4 482.





Assemble engine.

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