11 14 151 Replacing Crankshaft Radial Seal

11 14 151 - Replacing crankshaft radial seal (N51)





Special tools required:







Necessary preliminary tasks:
- Remove transmission.
- Remove flywheel .





Note:
Radial seal has six removal openings for removal with special tool 11 9 200 11 9 200 Puller.





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





Fit special tool 11 9 200 11 9 200 Puller. Insert metal screws into removal opening of radial seal and initially tighten without play (do not overtighten metal screws).
Screw in spindle (1) slowly and carefully and detach radial seal.






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.





Note:
Support sleeve (4) is supplied with radial shaft seal (1).
When radial shaft seal (1) is installed, only support sleeve (4) may be used as a slip sleeve.
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.





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.





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.






Installation:
Fit support sleeve (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 sleeve (4).





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 on preassembled radial shaft seal.





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.





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.





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





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.





Assemble engine.