11 14 151 Replacing crankshaft seal on transmission side (N51) (up to 12/31/08)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 9 181
11 9 182
11 9 183
11 9 184
11 9 200

Necessary preliminary tasks:

Remove transmission . See MANUAL TRANSMISSION or AUTOMATIC TRANSMISSION .
Remove Flywheel

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

Fig 1: Crankshaft Radial Seal

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: 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 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: Special Tool (11 9 200) And Spindle

Courtesy of BMW OF NORTH AMERICA, INC.

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: Crankshaft Radial Seal Running Surface And Sealing Surface

Courtesy of BMW OF NORTH AMERICA, INC.

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: Crankshaft Radial Seal, Support Bushing And Groove

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

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: Screw Caps, Bottle And Injector

Courtesy of BMW OF NORTH AMERICA, INC.

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: Crankshaft Radial Seal, Bushing, Groove And Support Sleeve

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 pre-assembled radial shaft seal.

Fig 8: Special Tools (11 9 182), (11 9 184) And Spacer Ring

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: Special Tools (11 9 181) And (11 9 183)

Courtesy of BMW OF NORTH AMERICA, INC.

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: Brushing Sealing Compound Into Grooves On Crankshaft Radial Seal

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 11: Injecting Sealing Compound Into Grooves On Crankshaft Radial Seal

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 128357, and prevents leakage.

Fig 12: Brushing Sealing Compound Into Grooves On Crankshaft Radial Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.