11 21 500 Replacing crankshaft (N54, N54T)

WARNING: This page is about a different variant/trim than selected.

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.