Valve Spring: Service and Repair

11 34 715 - Replacing all valve springs (M52/S52/M52TU/M54/M56)





Special tools required:
- 11 0 342
- 11 0 345
- 11 1 045
- 11 1 065
- 11 1 441
- 11 3 030 11 3 030 Placement Board for Tappet
- 11 3 250 11 3 250 Suction Cup

(cylinder head removed)





Preliminary tasks are described in Disassembling and assembling cylinder head Disassembling and Assembling Cylinder Head (M52/S52/M52TU/M54/M56).





Brace bucket tappets with special tool 11 3 250 11 3 250 Suction Cup.

Lift out bearing strip with bucket tappet.

Installation:
Only re-use used bucket tappets in the same tappet bore.





Arrange bucket tappets by cylinder and place on special tool 11 3 030 11 3 030 Placement Board for Tappet in correct order.





Insert special tool 11 1 441 from below in special tool 11 1 065 and secure with special tool 11 1 045.





Align special tool 11 0 345 in direction of valve shaft and select appropriate groove in special tool 11 0 342.





Press down valve spring on spring cap, top, and remove valve keys.

Remove valve spring and plate spring.





Arrangement:

1) - Valve
2) - Valve-stem seal
3) - Lower plate spring
4) - Valve spring
5) - Top plate spring
6) - Valve tapers