11 21 500 Replacing crankshaft

Special tools required:

IMPORTANT:

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

Aluminium screws/bolts are permitted with and without color coding (blue).

For reliable identification:

Aluminium 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 bolts (1).

Tightening torque 11 13 5AZ .

Installation note:

Replace aluminium screws.

Remove oil deflector (2).

Fig 1: Identifying Bolts And Screws

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Release bolts (1).

Tightening torque 11 11 2AZ .

Release screws (2).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminium screws.

Fig 2: Identifying Bolts And Screws

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Release bolts (1).

Tightening torque 11 11 4AZ .

Release screws (2).

Tightening torque 11 11 2AZ .

Installation note:

Replace aluminium 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 bolts (1).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminium screws.

Remove crankshaft lower section in upward direction.

Fig 4: Identifying Bolts Location

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Remove both crankshaft radial seals (1).

NOTE: Illustrations show N46.

Fig 5: Identifying Radial Shaft Seals

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Remove MAIN BEARING SHELLS (2 and 3), replace if necessary.

Remove 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 Shell And Crankshaft

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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: Illustrations show 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 aluminium screws.

Fig 8: Crankcase Bolts Tightening/Loosening Sequence

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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.

Fig 9: Identifying 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: Setting Up Stand With Magnetic Foot On Special Tool

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Installation note:

Always replace nozzles (1).

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

Fig 11: Inserting Nozzles Using Special Tool 11 9 360

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Installation note:

Replace CRANKSHAFT RADIAL SEAL at front .

Replace CRANKSHAFT RADIAL SEAL at rear .

Installation note:

Use primer and liquid gasket:

Loctite 171000 primer, BMW part number 83 19 7 515 683
Loctite 193140 liquid gasket, BMW part number 83 19 0 439 030

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

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 (pressing fixture) 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 (Loctite 171000 primer, BMW part number 83 19 7 515 683).

(Graphic shows N40).

Fig 14: Stopping Escaping Liquid Sealing Compound Using Primer

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Assemble engine.