11 21 500 Replacing Crankshaft (N12)

WARNING: This page is about a different car, the 2008 MINI Cooper and 2007 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 9 120
11 4 471
11 4 472
11 6 251
11 6 252
23 1 240

WARNING: Rotating components (danger or injury!).
It is absolutely essential to follow the procedure described below and the instructions on handling the special tools.

IMPORTANT: 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.
Removing oil pan.
Remove oil pump.
Remove timing chain.
Remove cylinder head.
Remove flywheel.

Release screws (1).

Tightening torque: See ENGINE - TIGHTENING TORQUES .

Remove oil deflector (2).

Remove all pistons.

Fig 1: Identifying Oil Deflector And Screws

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Drive out cover plates (1) with a cross-chisel (2).

Fig 2: Identifying Cover Plates With Cross-Chisel

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Release screws (26 to 11).

Release screws (10 to 1).

Fig 3: Identifying Screws

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Release crankcase lower half in direction of arrow with a regular screwdriver (2) and an open-end wrench (1).

Fig 4: Removing Crankcase

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Remove both radial shaft seals (1).

Fig 5: Identifying Radial Shaft Seals

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Remove crankshaft (1).

IMPORTANT: Remove crankshaft with aid of a second person.
Weight of crankshaft approx. 19 kg.

Remove main bearing shells, replace if necessary.

Fig 6: Identifying Crankshaft Main Bearing Shells

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IMPORTANT: Do not clean sealing faces with a metal-cutting tool.

Clean sealing faces with special tools 11 4 471 and 11 4 472 .

Fig 7: Identifying Special Tools (11 4 471 And 11 4 472) On Sealing Faces

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

Fig 8: Identifying Guide Sleeves

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Apply sealing bead (1) to crankcase lower half.

Fig 9: Identifying Crankcase Lower Half Sealing Bead

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Apply sealing bead (1) to crankcase upper half.

Apply a light coating of engine oil to bearings.

Fig 10: Identifying Crankcase Upper Half Sealing Bead

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Insert crankshaft (1).

IMPORTANT: Rotating component (danger of injury!)
Insert crankshaft with aid of a second person.
Weight of crankshaft approx. 19 kg.

Fig 11: Identifying Crankshaft Main Bearing Shells

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Lubricate all bearings from 1 to 5 with engine oil.

Install crankcase lower half.

Fig 12: Identifying Crankshaft Bearings

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Tighten bolts (1 to 10).

Tightening torque: See ENGINE - TIGHTENING TORQUES .

Tighten bolts (11 to 26).

Tightening torque: See ENGINE - TIGHTENING TORQUES .

Fig 13: Identifying Screws

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Tighten bolts exclusively with special tool 00 9 120 .

IMPORTANT: Jointing torque and angle of rotation must be observed without fail.

Fig 14: Identifying Special Tool (00 9 120)

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Apply a thin coating of Loctite 273 to cover sleeve (1) in area (2).

Fig 15: Identifying Cover Sleeve Area

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Drive cover sleeves firmly home with special tool 23 1 240 .

Fig 16: Identifying Special Tool (23 1 240) On Cover Sleeves

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Determine crankshaft axial clearance.

Attach special tool 11 6 252 with magnet.

Set special tool 11 6 251 to zero.

Press crankshaft in direction of rotation up to stop.

Fig 17: Identifying Special Tool (11 6 252 And 11 6 251) On Crankshaft

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Replace radial shaft seal at front.

Replace radial shaft seal at rear.

Assemble engine.