BMW X5 Owners & Service Manuals

BMW X5: Replacing Front Crankshaft Radial Seal (N52K)

Special tools required:

Necessary preliminary tasks:

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 non - positively connected to the crankshaft. Inlet and exhaust camshafts can turn in relation to crankshaft.

Risk of damage!

Housing Cover
Fig. 57: Central Bolt

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) , crankshaft 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.

Housing Cover
Fig. 58: Special Tools (11 9 221), (11 9 222) And (11 9 224)

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).

Housing Cover
Fig. 59: Special Tool (11 9 223)

Remove screws (special tool 11 9 224 ).

Housing Cover
Fig. 60: Special Tool (11 9 224)

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

Housing Cover
Fig. 61: Special Tool (11 9 222)

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.

Housing Cover
Fig. 62: Sealing And Running Surface

NOTE: Support bushing (1) is contained in scope of delivery of crankshaft radial seal (2).

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

Crankshaft radial seal (2) has a groove on both left and right sides.

IMPORTANT: After installation, the grooves must be filled with sealing compound.

Housing Cover
Fig. 63: Crankshaft Radial Seal And Support Bushing

Attach support bushing (2) with crankshaft radial seal (1).

Push on crankshaft radial seal (1) in direction of arrow.

Housing Cover
Fig. 64: Pushing Crankshaft Radial Seal

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

Remove support bushing (2).

Housing Cover
Fig. 65: Crankshaft Radial Seal And Support Bushing

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 (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.

Housing Cover
Fig. 66: Screw Caps, Injector And Bottle

Fit special tool 11 9 232.

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

Housing Cover
Fig. 67: Special Tool (11 9 232)

Draw in crankshaft radial seal with special tool 11 9 231 in conjunction with special tool 11 9 233 until flush.

Housing Cover
Fig. 68: Crankshaft Radial Seal And Support Bushing

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.

Housing Cover
Fig. 69: Grooves On Crankshaft Radial Seal

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

Housing Cover
Fig. 70: Injector And Grooves On Crankshaft Radial Seal

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.

Housing Cover
Fig. 71: Grooves On Crankshaft Radial Seal

Assemble engine.

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