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. See 11 33 050 REMOVING AND INSTALLING/REPLACING ALL ROCKER ARMS (N55) .

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 .

Fig 1: Inserting Valves Using Special Tool (11 1 480)

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For use on the N55 engine, special tool 11 6 380 must be re-machined 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.

Fig 2: Identifying Drilling Depth On Special Tool (11 6 380)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Valve Stem Seal

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 4: Pressing Valve Stem Seal Using Special Tool (11 6 380)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.