11 21 500 Replacing Crankshaft (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

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

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 . See 11 00 050 REMOVING AND INSTALLING ENGINE (N54) .
Mount engine on assembly stand . See 11 00 MOUNTING ENGINE ON ASSEMBLY STAND (N54) .
Remove vibration damper . See 11 23 010 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER (N54) .
Remove oil sump .
Remove oil pump . See 11 41 000 REMOVING AND INSTALLING OIL PUMP (N54) .
Remove triangular drive for oil pump. See 11 41 010 REMOVING AND INSTALLING/REPLACING CHAIN MODULE FOR OIL PUMP/VACUUM PUMP (N54) .
Remove timing chain module . See 11 31 051 REPLACING TIMING CHAIN (N54) .
Remove cylinder head . See 11 12 100 REMOVING AND INSTALLING CYLINDER HEAD (N54) .
Remove flywheel . See 11 22 500 REMOVING AND INSTALLING/REPLACING FLYWHEEL (N54) .
Removing all pistons . See 11 25 530 REMOVING AND INSTALLING/REPLACING ALL PISTONS (N54) .

Release screws (1).

Tightening torque. See 11 13 5AZ in OIL PUMP .

Installation:

Replace aluminum screws .

Remove oil deflector (2).

Fig 1: Identifying Screws And Oil Deflector

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Release screws (1).

Tightening torque. See 11 11 2AZ in 11 11 ENGINE BLOCK .

Unfasten screws (2).

Tightening torque. See 11 11 3AZ in 11 11 ENGINE BLOCK .

Installation:

Replace aluminum screws .

Fig 2: Identifying Aluminum Screws

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Release screws (1).

Tightening torque. See 11 11 4AZ in 11 11 ENGINE BLOCK .

Unfasten screws (2).

Tightening torque. See 11 11 2AZ in 11 11 ENGINE BLOCK .

Installation:

Replace aluminum screws .

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

Tightening torque. See 11 11 2AZ in 11 11 ENGINE BLOCK .

Fig 3: Crankcase Bolts Tightening/Loosening Sequence

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Release screws (1).

Tightening torque. See 11 11 3AZ in 11 11 ENGINE BLOCK .

Installation:

Replace aluminum screws .

Remove crankshaft lower section in upward direction.

Fig 4: Identifying Screws

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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: Removing And Installing Crankshaft

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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. See 11 11 1AZ in 11 11 ENGINE BLOCK .

Tighten screws (2) from inside outwards.

Tightening torque. See 11 11 2AZ in 11 11 ENGINE BLOCK .

Tighten screws (1).

Tightening torque. See 11 11 4AZ in 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 Using 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: Direction Of Moving 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: Drive In Nozzles Using Special Tool 11 9 360

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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 Screw Caps And Injector

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

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

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Stop (seal off) escaping liquid gasket with primer 1.3. (Picture shows N40).

Fig 14: Escaping Liquid Gasket With Primer

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Assemble engine.