Valve Guide Seal: Service and Repair

11 34 560 Replacing All Valve Stem Seals (N63)

Special tools required:







IMPORTANT:
Risk of damage to sealing lip on valve stem seal.
Fit new valve stem seals only when all valves have been installed.







Necessary preliminary work:
- Remove all valve springs.







Press special tool 11 6 370 onto the valve stem seal.
Withdraw valve stem seal by turning and simultaneously unscrewing special tool 11 6 370.







Installation note:
Lubricate valve stem with oil and insert valve.
Installation sleeve 11 1 380 is included in the delivery specification for the valve stem seals.

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







NOTE:
For use on the N63 engine, the special tool 11 6 380 must be remachined according to the sketch with a 6.2 mm drill bit dia. to a depth of A = approx. 45 mm.
This modification has already been taken into account for reordering.







Manually press on valve stem seal as far as it will go with special tool 11 6 380.







Assemble engine.