Connecting Rod Bearing: Service and Repair

11 24 571 Replacing all connecting rod bearings (N63)





Special tools required:
^ 00 2 590
^ 00 9 120





Important!
Note grinding stages on crankshaft.

Necessary preliminary tasks:
^ Removing all pistons








Install new connecting rod bearing shells.

Install one blue bearing shell (1) and one red bearing shell (2) in each conrod.

Install piston.





Installation:
The bearing shells on the conrod are coded.

Conrod bearing cap (1): the red bearing shell is fitted and the fastening notches are on the left and right sides of the bearing shell (see arrows).

Conrod (2): the blue bearing shell is fitted and the fastening notches are one side of the bearing shell (see arrows).

Check connecting rod bearing clearance.





Piston in BDC position.

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

Fit bearing caps so that pair numbers match up.





Important!
Do not distort connecting rods or crankshaft.

Use conrod bolts to check conrod bearing clearance.

Connecting rod bolts with special tool 00 9 120.

Tightening torque 11 24 1AZ.





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

Conrod bearing clearance.
- Remove plastic thread.
- Lubricate crankshaft and bearing shells.
- Install new conrod bolts.

Secure connecting rod bolts with special tool 00 9 120.





Tightening torque 11 24 1AZ.





Assemble engine.