11 21 500 Replacing crankshaft (N54)

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 510
00 9 120
11 4 370
11 4 440
11 9 360

See MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

See ENGINE - SPECIAL TOOLS (N54, N63) .

IMPORTANT: Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks:

Remove engine
Mount engine on assembly stand
Remove vibration damper
Remove oil sump
Remove oil pump
Remove triangular drive for oil pump
Remove timing chain module
Remove cylinder head .
Remove flywheel
Removing all pistons

Release screws (1).

Tightening torque 11 13 5AZ , see OIL SUMP

Installation:

Replace aluminum screws.

Remove oil deflector (2).

Fig 1: Identifying Screws And Oil Deflector

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Release screws (1).

Tightening torque 11 11 2AZ , see 11 11 ENGINE BLOCK

Unfasten screws (2).

Tightening torque 11 11 3AZ , see 11 11 ENGINE BLOCK

Installation:

Replace aluminum screws.

Fig 2: Identifying Screws (1 Of 3)

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Release screws (1).

Tightening torque 11 11 4AZ , see 11 11 ENGINE BLOCK

Unfasten screws (2).

Tightening torque 11 11 2AZ , see 11 11 ENGINE BLOCK

Installation:

Replace aluminum screws.

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

Tightening torque 11 11 1AZ , see 11 11 ENGINE BLOCK

Fig 3: Crankcase Bolts Tightening/Loosening Sequence

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Release screws (1).

Tightening torque 11 11 3AZ , see 11 11 ENGINE BLOCK

Installation:

Replace aluminum screws.

Remove crankshaft lower section in upward direction.

Fig 4: Identifying Screws (3 Of 3)

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Remove both crankshaft radial seals (1).

NOTE: Illustrations show N46.

Fig 5: Identifying Crankshaft Radial Seals

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

Remove and install crankshaft (1) in direction of arrow.

IMPORTANT: Remove crankshaft with aid of a second person.
Weight of crankshaft approx. 25 kg.

Fig 6: Identifying Crankshaft And Main Bearing Shells

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Check guide sleeves (1) for damage and correct seating.

Reinstall crankshaft.

Installation:

Lubricate all bearing points with engine oil.

Clean all sealing surfaces.

NOTE: Illustrations show N46.

Fig 7: Identifying Guide Sleeves

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

Tightening torque 11 11 1AZ , see 11 11 ENGINE BLOCK

Tighten screws (2) from inside outwards.

Tightening torque 11 11 2AZ , see 11 11 ENGINE BLOCK

Tighten screws (1).

Tightening torque 11 11 4AZ , see 11 11 ENGINE BLOCK

Installation:

Replace aluminum screws.

Fig 8: Crankcase Bolts Tightening/Loosening Sequence

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Tighten aluminum screws exclusively with special tool 00 9 120 .

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

Fig 9: Tightening Aluminum Screws Exclusively With Special Tool 00 9 120

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Set up stand with magnetic base 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.

Fig 10: Positioning Special Tool 00 2 510 On Crankshaft

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Installation:

Always replace nozzles (1).

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

Fig 11: Driving In Both Nozzles With Special Tool 11 9 360 Into Crankcase

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Installation:

Replace crankshaft radial seal at front.

Replace crankshaft radial seal at rear.

Installation:

Use primer 1.3 and liquid gasket 1.4.

Prepare liquid gasket (1) in special tool 11 4 370 .

Screw on nozzle for injecting liquid gasket.

Fig 12: Identifying Liquid Gasket And Special Tool 11 4 370

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

Fig 13: Inserting Liquid Gasket With Special Tool 11 4 370

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Stop (seal off) escaping liquid gasket with primer 1.3.

(Picture shows N40).

Fig 14: Coating Surface Of Sealing Compound In Both Grooves With Loctite Primer, Manufacturer Number 171000

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Assemble engine.