Valve Guide Seal: Service and Repair

11 34 560 Replacing All Valve Stem Seals (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.







Press special tool 11 1 480 forcefully onto valve stem seals.
Detach valve stem seal from valve stem by turning and simultaneously pulling special tool 11 1 480.

Installation note:
Insert all valves.







NOTE:
For use on the N55 engine, special tool 11 6 380 must be remachined according to the graphic with a 10 mm dia. drill bit to a depth of B = approx. 23 mm.
This modification has already been taken into account for reordering.







IMPORTANT:
Different diameters at valve stem.
All valve stem seals are colour-coded.

For 5 mm dia. valves, the valve stem seal is marked red or brown.
For 6 mm dia. valves, the valve stem seal is marked green.







Installation note:
Fit the mounting sleeves (plastic sleeves) contained in the delivery specification on the valve stem end.
Lubricate assembly sleeve.

Press on valve stem seal by hand with special tool 11 6 380 as far as it will go.

NOTE: Graphic N42.







Assemble engine.