11 14 005 Replacing front crankshaft radial seal (N52)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2008 BMW Z4, 2007 BMW Z4, 2007 BMW 530xi, 2007 BMW 530i, and 2007 BMW 525xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 9 221
11 9 222
11 9 223
11 9 224
11 9 231
11 9 232
11 9 233

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 nonpositively connected to the crankshaft. The camshafts to the crankshaft can warp (risk of damage).

Fig 1: Identifying Central Bolt For Warning

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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), radial 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: Identifying Special Tool (11 9 224), (11 9 222) And (11 9 221)

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Insert screws (special tool 11 9 223) and screw in until they make contact without play.

IMPORTANT: Do not overload special tool 11 9 223 (metal screws).

Fig 3: Identifying Special Tool (11 9 223) And Screws

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Remove screws (special tool 11 9 224).

Fig 4: Identifying Special Tool (11 9 224) And Screws

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Insert screw (special tool 11 9 222) carefully and slowly and withdraw radial seal (1).

Fig 5: Identifying Special Tool (11 9 222) And Radial Seal

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Installation:

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

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

Fig 6: Identifying Shaft Seal And Radial Shaft Seal Running Surface

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NOTE: Support sleeve (1) is supplied with radial seal (2).

When radial seal (2) is installed, only support sleeve (1) may be used as a slip sleeve.

Radial 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 Radial Seal And Support Sleeves

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Attach support bushing (2) with radial shaft seal (1). Push on radial shaft seal (1) in direction of arrow.

Fig 8: Identifying Radial Shaft Seal And Support Bushing

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Pay attention to opening on radial shaft seal (1) on left and right.

Remove support bushing (2).

Fig 9: Identifying Radial Shaft Seal And Bushing

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IMPORTANT: The following text describes installation and sealing between the engine block and radial seal.

The engine block will not be leakproof at the outside of the radial seal if you fail to comply with the individual work steps and the work sequence.

NOTE: The required parts are available from the BMW Parts Service (EPC).

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 10: Identifying Screw Caps, Injector And Loctite Sealing Compound (128357)

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Fit special tool 11 9 232.

Coat both grooves on radial shaft seal with Loctite primer, manufacturer's number 171000, and expose to air for approx. one minute.

Fig 11: Identifying Special Tool (11 9 232)

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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 12: Identifying Special Tool (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 radial shaft seal and coat housing partition on engine block.

Fig 13: Identifying Radial Shaft Seal Groove

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

Fig 14: Identifying Radial Shaft Seal Groove And Loctite 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.

Fig 15: Identifying Radial Shaft Seal Groove

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Assemble engine.