Connecting Rod Bearing: Service and Repair

11 24 571 Replacing All Connecting Rod Bearings (N63)

Special tools required:







IMPORTANT: Note grinding stages on crankshaft







Necessary preliminary work:
- Removing all pistons







Install new connecting rod bearing shells.
Install one blue bearing shell (1) and one red bearing shell (2) in each connecting rod.
Install piston.







Installation note:
The bearing shells on the connecting rod are coded.

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







Check connecting-rod bearing play.
Piston in BDC position.
Fit special tool 00 2 590 (Plastigage type PG 1) to oil-free crankshaft.
Fit bearing caps so that matching numbers match up.







IMPORTANT: Do not distort connecting rods or crankshaft.

Use connecting rod bolts to check connecting-rod bearing play.
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 measuring scale.
Connecting-rod bearing play.
- Remove plastic thread.
- Lubricate crankshaft and bearing shells.
- Install new connecting rod bolts.







Secure connecting rod bolts with special tool 00 9 120.
Tightening torque 11 24 1AZ.







Assemble engine.