Connecting Rod Bearing: Service and Repair

Connecting Rod Bearing

(Piston removed)

Caution: Pay attention to crankshaft grinding stages, refer to Engine, Specifications.





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





Check connecting-rod 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 connecting-rod bolts to check connecting-rod clearance.
Tighten down conrod screws with special tool 00 9 120 or special tool 11 2 110, respectively.
Tightening torque, refer to Engine, Specifications.





Removing bearing cover and reading off bearing clearance, refer to Engine, Specifications, on width of pinched plastic thread with the help of the measuring scale.
Remove plastic thread.





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