11 14 151 Replacing crankshaft radial seal (N54, N54T) up to 12.31.08

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Necessary preliminary tasks:

Remove transmission. See 2300018 REMOVING AND INSTALLING TRANSMISSION (GS6-53BZ) N54 or 28 00 001 REMOVING AND INSTALLING TWIN-CLUTCH GEARBOX (GS7D36SG) N54 .
Remove FLYWHEEL .

NOTE: Radial shaft seal has six removal openings for removal with special tool 11 9 200 .

Fig 1: Locating Crankshaft Radial Seal Removal Openings

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Rubber Coating And Removal Opening

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 3: Identifying Special Tool (11 9 200)

Courtesy of BMW OF NORTH AMERICA, INC.

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 radial shaft seal.

Fig 4: Identifying Radial Shaft Running Surface Seal

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Support bush (4) is supplied with radial shaft seal (1).

When radial shaft seal (1) is installed, only support bush (4) may be used as a slip bush.

Radial shaft 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, Grooves And Bushing

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The seal between the engine block and radial shaft seal is described below.

The engine block will not be leakproof at the outside of the radial shaft 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 Department (Electronic Parts Catalogue).

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 193140.

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

Fig 6: Identifying Injector, Sealing Compound And Bottle

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

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

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

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

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

Carefully remove support bush (4).

Fig 7: Identifying Support Sleeve With Radial Shaft Seal On Crankshaft

Courtesy of BMW OF NORTH AMERICA, INC.

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 With Special Tool (11 9 182 And 11 9 183)

Courtesy of BMW OF NORTH AMERICA, INC.

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)

Courtesy of BMW OF NORTH AMERICA, INC.

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 10: Coating Surface Of Sealing Compound In Both Grooves Using Loctite Primer

Courtesy of BMW OF NORTH AMERICA, INC.

Fill both grooves (1) flush with Loctite sealing compound, manufacturer's number 193140.

Fig 11: Filling Both Grooves Flush With Loctite Sealing Compound

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Loctite primer, manufacturer's number 171000, binds the Loctite sealing compound, manufacturer's number 193140, and prevents leakage.

Fig 12: Coating Surface Of Sealing Compound In Both Grooves Using Loctite Primer

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.