Connecting Rod Bearing: Service and Repair

Install new conrod bearing shells.
For each conrod, install red and blue bearing shell (irrespective of color coding on conrod shaft).

Caution: Note grinding stage of crankshaft, refer to Engine, Specifications.

Install pistons, refer to Piston, Engine, Service and Repair.





Check conrod bearing clearance.
Piston in BDC position.
Fit special tool 00 2 590 (Plastigage Type PG 1) to the oil-free crankshaft.
Place bearing caps in position, making sure that matching numbers are paired.






Caution: Do not turn the connecting rods or crankshaft.

Use the old conrod bolts to check conrod clearance.
Tighten down conrod screws with special tool 00 9 120 or special tool 11 2110.
Tightening Torque, refer to Engine, Specifications.





Remove bearing cover and read off bearing clearance across width of pinched plastic thread with the help of the measuring scale.
Conrod bearing clearance, refer to Engine, Specifications.
Remove plastic thread.





Summary:
Color code/shaft diameter/bearing strength
Rt = red
BI = blue
1 Crankpin
2 Bearing clearance
3 Bearing shells: red or blue
4 Conrod