11 14 005 Replacing Front Crankshaft Seal (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to ENGINE - SPECIAL TOOLS (N51) .

11 0 371
11 0 372
11 9 221
11 9 222
11 9 224
11 9 231
11 9 232
11 9 233
11 9 234

Necessary preliminary tasks:

Remove vibration damper . See 11 22 500 REMOVING AND INSTALLING OR REPLACING FLYWHEEL (N51) .

IMPORTANT: Do not release central bolt.

If the central bolt is released, the sprocket wheels of the timing chain and the oil pump will no longer be non-positively connected to the crankshaft. The camshafts to the crankshaft can warp (risk of damage) .

Fig 1: Identifying Central Bolt

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Turn back special tool 11 9 222. See Fig 2.

Push special tool 11 9 221 onto crankshaft. See Fig 2.

IMPORTANT: When screws are tightened down (special tool 11 9 224), crankshaft seal is pressed inwards approx. 1 mm and thus slackened for subsequent removal. See Fig 2.

Fig 2: Identifying Special Tools

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Insert screws (special tool 11 9 224) and tighten down to approx. 20 Nm.

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

Screw in spindle 11 0 372. See Fig 3.

Release crankshaft seal from housing.

Repeat the operation several times if necessary.

Fig 3: Identifying Special Tool (11 3 372)

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

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

Fig 4: Identifying Crankshaft Seal

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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 leakproof at the outside of the crankshaft seal if you fail to comply with the individual work steps and the work sequence.

Installation:

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.

Illustration N42.

Fig 5: Identifying Sealing Surface And Running Surface Of Crankshaft Seal

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Screw special tool 11 9 232 with screws (special tool 11 9 234) to crankshaft. See Fig 6.

Fig 6: Identifying Special Tools (11 9 234 And 11 9 232)

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NOTE: Support sleeve (1) is supplied with crankshaft seal (2).
When crankshaft seal (2) is installed, only support sleeve (1) may be used as a slip sleeve.
Crankshaft seal (2) has a groove on both left and right sides.

IMPORTANT: After installation, the grooves must be filled with sealing compound.

Fig 7: Identifying Crankshaft Seal And Support Sleeve

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NOTE: The required parts are available from the BMW Parts Service (Electronic Parts Catalogue ETK).

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

Screw on metering needle.

Insert piston for pressing out.

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

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

Fig 8: Identifying Injector, Sealing Compound And Bottle

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Push support sleeve (1) with radial shaft seal (2) onto special tool 11 9 232. See Fig 9.

IMPORTANT: Support sleeve (1) remains on special tool 11 9 232, until crankshaft seal is drawn in.

Fig 9: Pushing Support Sleeve With Radial Shaft Seal Onto Special Tool

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Align groove (3) centrally to housing partition (4).

Coat both grooves (3) on crankshaft seal (2) with Loctite primer, manufacturer's number 171000, and expose to air for approx. one minute.

Draw in crankshaft seal with special tool 11 9 231 in conjunction with special tool 11 9 233 until flush. See Fig 10.

Fig 10: Identifying Special Tools (11 9 231 And 11 9 233)

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Before filling with sealing compound:

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

Illustration N42.

Fig 11: Identifying Grooves On Crankshaft Seal

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

Illustration N42.

Fig 12: Identifying Injector And Grooves

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NOTE: Loctite primer, manufacturer's number 171000, binds the Loctite sealing compound, manufacturer's number 128357, and prevents leakage.

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

Illustration N42.

Fig 13: Identifying Grooves

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Assemble engine.