1114005 Replacing front crankshaft seal (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove VIBRATION DAMPER .

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: Caution For Releasing Central Bolt

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Turn back special tool 11 9 222.

Push special tool 11 9 221 onto crankshaft.

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.

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

Fig 2: Tightening Screws Using Special Tool (11 9 224)

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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 3: Identifying Special Tools (11 0 372 And 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 4: Identifying Crankshaft Radial Seal At 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 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: Locating Sealing Surface

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

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

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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.

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 Sealing Compound And Bottle Of Injector

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

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

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.

Fig 9: Identifying Sleeve, Crankshaft Seal, Groove And Housing Partition And Special Tool (11 9 232)

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

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: Inserting Brush Into Groove

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

Illustration N42.

Fig 12: Filling Grooves Flush With Sealant Using Injector

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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: Inserting Brush Into Groove

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Assemble engine.