BMW X5 Owners & Service Manuals

BMW X5: Replacing Crankshaft (N52K)

Special tools required:

IMPORTANT: Aluminium-magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released.

The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks:

Release screws (1).

Tightening torque: 11 13 6AZ.

Installation:

Replace aluminium screws.

Remove oil deflector (2).

NOTE: Picture shows the screw connection of the oil deflector (2) for vehicles with optional extra SA203 (all-wheel drive).

Crankshaft With Bearing
Fig. 89: Oil Deflector And Screws

Release screws (1).

Tightening torque: 11 11 2AZ.

Release screws (2).

Tightening torque: 11 11 3AZ.

Installation:

Replace aluminium screws.

Crankshaft With Bearing
Fig. 90: Screws

Release screws (1).

Tightening torque: 11 11 4AZ.

Release screws (2).

Tightening torque: 11 11 2AZ.

Installation:

Replace aluminium screws.

Release steel screws (1 to 14) from outside inwards.

Tightening torque: 11 11 1AZ.

Crankshaft With Bearing
Fig. 91: Crankshaft Bolts Tightening Sequence

Release screws (1).

Tightening torque: 11 11 3AZ.

Installation:

Replace aluminium screws.

Lift out bedplate.

Crankshaft With Bearing
Fig. 92: Bedplate Screws

Remove crankshaft (1) in direction of arrow.

IMPORTANT: Remove crankshaft with aid of a second person.

Weight of crankshaft approx. 25 kg.

Remove bearing shells (2) and guide bearing shell (3), replace if necessary.

Clean all sealing faces with special tool 11 4 470.

Crankshaft With Bearing
Fig. 93: Bearing Shells

Check adapter sleeves (1) for damage and secure seating; replace if necessary.

Install all bearing shells.

Installation:

Lubricate all bearing points with engine oil.

NOTE: Picture shows N46.

Crankshaft With Bearing
Fig. 94: Adapter Sleeves

Insert crankshaft (1).

IMPORTANT: Install crankshaft with aid of a second person.

Weight of crankshaft approx. 25 kg.

Crankshaft With Bearing
Fig. 95: Crankshaft

Tighten steel screws (1 to 14) from inside outwards.

Tightening torque: 11 11 1AZ.

Tighten screws (2) from inside outwards.

Tightening torque: 11 11 2AZ.

Tighten screws (1).

Tightening torque: 11 11 4AZ.

Installation:

Replace aluminium screws.

Crankshaft With Bearing
Fig. 96: Crankshaft Bolts Tightening Sequence

Tighten aluminium screws exclusively with special tool 00 9 120.

IMPORTANT: In the case of aluminium screws, jointing torque and angle of rotation must be observed without fail.

Crankshaft With Bearing
Fig. 97: Special Tool (00 9 120)

Set up stand with magnetic foot (1) on special tool 11 4 440.

Set up special tool 00 2 510 on stand.

Position special tool 00 2 510 on crankshaft.

Move crankshaft in direction of arrow.

Determine bearing play.

Crankshaft With Bearing
Fig. 98: Moving Crankshaft

Drive in both nozzles (1) with special tool 11 9 360 on left and right into crankcase.

Installation:

Always replace nozzles (1).

Crankshaft With Bearing
Fig. 99: Nozzles With Special Tool (11 9 360)

Installation:

Prepare sealing compound (1) in special tool 11 4 370.

Screw on nozzle (2) for injecting sealing compound.

Slowly insert sealing compound (1) with special tool 11 4 370 in direction of arrow.

Crankshaft With Bearing
Fig. 100: Inserting Sealing Compound With Special Tool (11 4 370)

Replace crankshaft radial seal at front, see 11 14 005 Replacing front crankshaft radial seal (N52K).

Replace crankshaft radial seal (transmission side).

Assemble engine.

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