11 24 571 Replacing All Conrod Bearings (N62)

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 Letter And Numbers Denoting Crankshaft Construction Stage And Bearing Shell Classification

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Install new conrod bearing shells.

Fig 2: Installing Conrod Bearing Shells

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

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

Check Connecting-Rod Bearing Clearance: 

Piston in BDC position.

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

Position bearing caps so that pair numbers match up.

Fig 3: Aligning Bearing Caps

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Use the old connecting-rod bolts to check connecting-rod clearance.

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

Tightening torque, refer to 11 24 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 4: Identifying Torque Angle Measuring Dial

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

Fig 5: Measuring Bearing Play Using Measurement Scale

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Conrod bearing clearance. Refer to ENGINE - TECHNICAL DATA - 645CI .

• Remove plastic thread.
• Lubricate crankshaft and bearing shells.
• Install new connecting-rod screws.

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

Tightening torque, refer to 11 24 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 6: View Of Torque Angle Measuring Dial

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