Connecting Rod Bearing: Service and Repair

INSTALLATION OF CONNECTING ROD BEARINGS
Fit all rods on one bank until complete.
The bearing caps are not interchangeable and should be marked at removal to insure correct assembly.
The bearing shells must be installed with the tangs inserted into the machined grooves in the rods and caps. Install cap with the tangs on the same side as the rod.
Limits of taper or out-of-round on any crankshaft journals should be held to 0.015 mm (0.0006 inch). Bearings are available in 0.025 mm (0.001 inch) and 0.254 mm (0.010 inch) undersize. Install the bearings in pairs. Do not use a new bearing half with an old bearing half. Do not file the rods or bearing caps.





Fig. 14





Connecting Rod Bearing Oil Clearance Chart

1. Follow procedure specified in Engine; Service and Repair; Standard Service Procedures for Measuring Main Bearing Clearance and Connecting Rod Bearing Clearance. Refer to Connecting Rod Bearing Oil Clearance Chart for specifications.





Fig. 15

NOTE: The rod bearing bolts should be examined before reuse. If the threads are necked down the bolts should be replaced.

2. Necking can be checked by holding a scale or straight edge against the threads. If all the threads do not contact the scale the bolt should be replaced.
3. Before installing the nuts the threads should be oiled with engine oil.
4. Install nuts on each bolt finger tight then alternately torque each nut to assemble the cap properly.
5. Tighten the nuts to 54 Nm PLUS 1/4 turn (40 ft. lbs. PLUS 1/4 turn).





Fig. 16





Connecting Rod Side Clearance Chart

6. Using a feeler gauge, check connecting rod side clearance. Refer to Connecting Rod Side Clearance Chart for specifications.