11 21 500 Replacing crankshaft (N54, N54T)

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: Aluminium screws/bolts must be replaced each time they are released .
Aluminium screws/bolts are permitted with and without
colour 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 screws (1).

Tightening torque 11 13 5AZ .

Installation note:

Replace aluminium screws.

Remove oil deflector (2).

Fig 1: Identifying Oil Deflector And Screws

Release screws (1).

Tightening torque 11 11 2AZ .

Unfasten screws (2).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminium screws.

Fig 2: Identifying Crankshaft Screws (N54, N54T)

Release screws (1).

Tightening torque 11 11 4AZ .

Unfasten screws (2).

Tightening torque 11 11 2AZ .

Installation note:

Replace aluminium screws.

Fig 3: Crankcase Bolts Tightening/Loosening Sequence

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

Tightening torque 11 11 1AZ .

Release screws (1).

Tightening torque 11 11 3AZ .

Installation note:

Replace aluminium screws.

Remove crankshaft lower section in upward direction.

Fig 4: Identifying Crankshaft Lower Section Screws

Remove both crankshaft seals (1).

NOTE: Graphic shows N46.

Fig 5: Identifying Crankshaft Seals

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 kilograms.

Fig 6: Removing Crankshaft Main Bearing Shells

Check fitting bush (1) for damage and correct seating.

Reinstall crankshaft.

Installation note:

Lubricate all bearing positions with engine oil.

Clean all sealing surfaces.

NOTE: Graphic shows N46.

Fig 7: Identifying Crankshaft Fitting Bush

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

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: Tightening Crankshaft Aluminium Screw Using Special Tool (00 9 120)

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) Onto Crankshaft

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: Installing Crankcase Nozzle Using Special Tool (11 9 360)

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 Screw Caps And Injector

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)

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

(Graphic shows N40).

Fig 14: Stopping Liquid Sealing Compound Using Primer 1.3

Assemble engine.