11 21 500 Replacing crankshaft (N54, N54T)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

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 .

Installation note:

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 .

Unfasten screws (2).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminum screws.

Fig 2: Identifying Aluminum Screws

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Release screws (1).

Tightening torque 11 11 4AZ .

Unfasten screws (2).

Tightening torque 11 11 2AZ .

Installation note:

Replace aluminum screws.

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

Tightening torque 11 11 1AZ .

Fig 3: Crankcase Bolts Tightening/Loosening Sequence

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Release screws (1).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminum screws.

Remove crankshaft lower section in upward direction.

Fig 4: Identifying Screws

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Remove both crankshaft seals (1).

NOTE: Graphic shows 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 Bearing Shells

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

Reinstall crankshaft.

Installation note:

Lubricate all bearing points with engine oil.

Clean all sealing surfaces.

NOTE: Graphic shows N46.

Fig 7: Identifying Adapter Sleeves

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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 note:

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 Main Bearing Bolts Using 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. See CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS N54/B30 ; CRANKSHAFT AND BEARINGS N54/B30 ; or CRANKSHAFT AND BEARINGS N54/B30 .

Fig 10: Setting Up Stand With Magnetic Base On Special Tool 11 4 440

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Installation note:

Always replace nozzles (1).

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

Fig 11: Inserting Nozzles Using Special Tool 11 9 360

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Installation note:

CRANKSHAFT SEAL - replace front.

CRANKSHAFT SEAL - replace rear.

Installation note:

Use PRIMER 1.3 AND LIQUID GASKET 1.4 .

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

Screw on nozzle for injecting liquid gasket.

Fig 12: Identifying Injector, Sealing Compound And Bottle

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

Fig 13: Inserting Liquid Sealing Compound Using Special Tool 11 4 370

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Stop (seal off) escaping liquid sealing compound with primer 1.3.

(Graphic shows N40).

Fig 14: Stopping Escaping Liquid Sealing Compound Using Primer

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Assemble engine.