11 24 571 Replacing All CONROD Bearings (N62/N62TU)

Special tools required: 

• 00 2 590 
• 00 9 120 
• 11 2 110

(piston removed) 

The letter (1) denotes the crankshaft construction stage.

The numbers (2) denote the bearing shell classification for the relevant bearing position from 1 to 5 (main bearing cap).

Fig 1: Identifying Crankshaft Construction Stage

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Install new conrod bearing shells.

Insert one red and one blue bearing shell for each conrod.

Install piston.  See 11 25 530 REMOVING AND INSTALLING/REPLACING ALL PISTONS (N62) .

Fig 2: Locating Bearing Shells

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Check connecting-rod bearing clearance: 

Piston in BDC position.

Fit special tool 00 2 590  (Plastigage Type PG 1) to the oil-free crankshaft.

Fit bearing caps so that pair numbers match up.

Fig 3: Identifying Bearing Caps Number

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Use conrod bolts to check conrod bearing clearance.

Tighten down conrod bolts with special tool 00 9 120  or special tool 11 2 110.

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 4: Identifying Special Tool (00 9 120)

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Remove bearing cap and read off bearing play at width of flattened plastic thread with assistance of measurement scale.

Conrod bearing clearance.  See ENGINE - TECHNICAL DATA .

• Remove plastic thread.
• Lubricate crankshaft and bearing shells.
• Install new conrod bolts.
  Fig 5: Measuring Bearing Play

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Tighten down conrod bolts with special tool 00 9 120  or special tool 11 2 110.

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 6: Identifying Special Tool (00 9 120)

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