11 14 151 Replacing crankshaft seal (N52K) (to 12/1/08)

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Special tools required:

Necessary preliminary tasks:

Remove TRANSMISSION
Remove FLYWHEEL

NOTE: Crankshaft radial seal has six removal openings for removal with special tool 11 9 200 .

Fig 1: Locating Crankshaft Radial Seal

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NOTE: If necessary, remove rubber coating (1) on top side of crankshaft radial seal and expose a removal opening (2) (see illustration).

Fig 2: Identifying Rubber Coating And Opening

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Fit special tool 11 9 200 . Insert sheet metal screws into removal opening of crankshaft radial seal and fasten without play (do not overtighten sheet metal screws).

Screw in spindle (1) slowly and carefully and detach crankshaft radial seal.

Fig 3: Identifying Spindle And Special Tool

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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 crankshaft radial seal.

Fig 4: Identifying Sealing Surface And Running Surface Of Crankshaft Radial Seal

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NOTE: Support bushing (4) is contained in scope of delivery of crankshaft radial seal (1).
When crankshaft radial seal (1) is installed, only support bushing (4) may be used as a slip bushing.
Crankshaft radial seal (1) has a groove (2) on both left and right sides.

IMPORTANT: After installation, grooves (2) must be filled with sealing compound.

Fig 5: Identifying Crankshaft Radial Seal, Groove And Bushing

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IMPORTANT: The following text describes installation and sealing between the engine block and crankshaft radial seal.
The engine block will not be leakproof at the outside of the crankshaft 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 (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 6: Identifying Bottle, Screw Caps And Injector

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Installation:

Fit support bushing (4) with crankshaft radial seal (1) on crankshaft.

Align groove (2) centrally to housing partition (3).

Coat both grooves (2) on crankshaft radial seal (1) with Loctite primer, manufacturer's number 171000, and expose to air for approx. one minute.

Push crankshaft radial seal (1) by hand as far as possible onto running surface.

Carefully remove support sleeve (4).

Fig 7: Identifying Crankshaft Radial Seal, Support Sleeve And Grooves

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NOTE: Spacer ring (1) is supplied with radial shaft seal.

Screw special tool 11 9 182 with screws (special tool 11 9 184 ) to crankshaft.

Fit spacer ring (1) on preassembled radial shaft seal.

Fig 8: Identifying Spacer Ring And Special Tool

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Draw in radial shaft seal and spacer ring with special tool 11 9 181 in conjunction with special tool 11 9 183 .

Then remove spacer ring again.

Fig 9: Identifying Special Tool 11 9 181 And 11 9 183

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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 radial seal in order to coat housing partition on engine block.

Fig 10: Inserting Brush Into Grooves On Crankshaft Radial Seal

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Using injector, fill both grooves (1) flush with Loctite sealing compound, manufacturer's number 128357.

Fig 11: Filling Grooves Flush With Loctite Sealing Compound

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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 12: Inserting Brush Into Grooves On Crankshaft Radial Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.