11 34 560 Replacing all valve stem seals (N63 hybrid)

Special tools required:

WARNING: High-voltage system - danger to life!

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 tasks:

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 .

Fig 1: Pressing Special Tool (11 6 370) Onto Valve Stem Seal

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Installation:

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.

Fig 2: Installing Valve Stem Seal On Special Tool (11 1 380)

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

Fig 3: Identifying Special Tool (11 6 380)

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

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

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Assemble engine.