Replacing front crankshaft seal (S55 engine)

Special tools required:

11 0 371
11 0 372
11 4 370
11 9 221
11 9 222
11 9 224
11 9 231
11 9 233
11 9 234
11 9 235
2 303 795

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!

G09844534

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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.

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

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

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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.

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Remove support ring (1).

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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).

G09844539

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

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

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Assemble engine.