Valve Guide Seal: Service and Repair

Replacing All Valve Stem Seals
(Cylinder Head Removed)

Preliminary tasks are described in Disassembling and assembling cylinder head, refer to Cylinder Head Assembly, Service and Repair.





Remove valve stem seal with special tool 11 1 480.





S50 B30
Valve stem diameter 7 mm:

Installation:
Lubricate valve stem with oil and insert valve.
Fit special tool 11 1 380.
Coat new valve stem seal (1) with oil and install.





S50 B32 and S54
Valve stem diameter 6 mm:

Installation:
Lubricate valve stem with oil and insert valve.
Fit special tool 11 1 960.
Coat new valve stem seal (1) with oil and install.





Note: Special tool 11 1 200 is used for valve stem diameters 6 mm and 7 mm.

Installation:
Press valve stem seal firmly home by hand with special tool 11 1 200.