11 14 005 Replacing front crankshaft seal (N55) up to 02.2014

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

Necessary preliminary tasks: 

• Remove VIBRATION DAMPER 

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 Stop Bolt

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Screw special tool 11 0 371 with 80 Newton meters into the crankshaft seal.

Screw in spindle 11 0 372 .

Release crankshaft seal from housing.

Repeat the operation several times if necessary.

Fig 2: Identifying Special Tool (11 0 371)

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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 Crankshaft Seal And Cutting Line

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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.

Installation note: 

Clean sealing surface (1) and degrease thoroughly in area of housing partition.

Apply a light coat of oil to running surface (2) of crankshaft seal.

Graphic N42.

Fig 4: Locating Crankshaft Seal Sealing Surface

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

Fig 5: Pushing Radial Shaft Seal

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Screw special tool 11 9 235 with special tool 11 9 234 on crankshaft.

Fig 6: Identifying Special Tool (11 9 235 And 11 9 234)

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Align groove (2) of radial shaft seal (1) centered to the housing partition (3.

Fig 7: Aligning Radial Shaft Seal Groove To Housing Partition

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Draw in radial shaft seal with special tool 11 9 231 in conjunction with special tool 11 9 233 until flush.

Fig 8: Identifying Special Tool (11 9 231 And 11 9 233)

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Installation note: 

Use PRIMER 1.3 AND LIQUID SEAL 1.4 .

Prepare liquid sealing compound (1) in special tool 11 4 370 .

Remove sealing caps (1) from injector (2).

Screw on metering needle.

Insert piston for pressing out.

Syringe (2) contains the sealing compound Loctite, manufacturer's number 128357.

Bottle (3) contains the primer Loctite, manufacturer's number 171000.

Fig 9: Identifying Sealing Caps, Injector And Syringe

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Before filling with sealing compound:

Moisten brush with Loctite primer, manufacturer's number 171000. Insert brush as far as possible into grooves (1) on crankshaft seal in order to coat housing partition on engine block.

Graphic N42.

Fig 10: Applying Sealing Compound In Grooves Using Loctite Primer

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Using syringe (2), fill both grooves (3) flush with Loctite sealing compound, manufacturer's number 128357.

Graphic N42.

Fig 11: Filling Grooves Flush Using Loctite Sealing Compound

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Coat surface of sealing compound in both grooves (1) with Loctite primer, manufacturer's number 171000.

Graphic N42.

Fig 12: Applying Sealing Compound In Grooves Using Loctite Primer

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Assemble engine.