11 14 005 Replacing front crankshaft seal (N55) - from 02.2014

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Special tools required:

Necessary preliminary tasks:

Remove VIBRATION ABSORBER .

IMPORTANT: Do not release central bolt.
If the central bolt is released, the sprockets of the timing chain and the oil pump will no longer be non-positively connected to the crankshaft. Intake and exhaust camshafts can turn in relation to crankshaft.
Risk of damage!

Fig 1: Identifying Central Bolt

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Screw special tool 11 0 371 to 80 Nm into crankshaft seal.

Screw in spindle 11 0 372 .

Release crankshaft seal from housing.

Repeat the operation several times if necessary.

Fig 2: Releasing Crankshaft Seal From Housing

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Carefully saw open crankshaft seal (1) at cutting line (2).

Remove crankshaft seal (1) from special tool 11 0 371 .

Fig 3: Identifying Cutting Line

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IMPORTANT: The following text describes installation and sealing between the engine block and crankshaft seal.
The engine block will not be leak proof at the outside of the crankshaft seal if you fail to comply with the individual work steps and the work sequence.

Push radial shaft seal (1) 11 9 235 carefully in direction of arrow on the special tool.

Fig 4: Pushing Radial Shaft Seal Onto Special Tool

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Remove support ring (1).

Fig 5: Identifying Support Ring

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IMPORTANT: Special tool 11 9 235 can only be fastened with
2 opposite bolts.
Determine hole pattern on special tool.

Fasten special tool 11 9 235 onto crankshaft by 2 screws (1).

Fig 6: Identifying Special Tool (11 9 235) And Screws

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Position radial shaft seal (1) on crankcase in direction of arrow using special tool 11 9 235 .

Fig 7: Positioning Radial Shaft Seal On Crankcase

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Insert radial shaft seal flush into crankcase with special tool 11 9 231 and 2 303 795 .

Fig 8: Installing Radial Shaft Seal

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Assemble engine.