Bearing Selection

Crankshaft Main Bearing Selection

Important: If crankshaft bearing failure is due to other than normal wear, investigate the cause. Inspect the crankshaft or connecting rod bearing bores.





1. Inspect the connecting rod bearing bores or crankshaft main bearing bores using the following procedure:
1.1. Tighten the bearing cap to specification.
1.2. Measure the bearing bore for taper and out-of-round.
1.3. No taper or out-of-round should exist.

2. Install the original crankshaft main bearing inserts on to the cylinder block and the main bearing caps.
3. Carefully place the crankshaft on to the bearing inserts in the cylinder block.





4. Lay a piece of gauging plastic (1) across each crankshaft main journal.

Important: Do not turn the crankshaft while measuring the bearing clearance.

5. Carefully place the main bearing caps on to the cylinder block.





6. Install the ten main bearing cap bolts.
^ Tighten the crankshaft main bearing cap bolts in the sequence shown, use three progressive steps to obtain 54 Nm (39 ft. lbs.).
7. After reaching the proper torque, remove the ten crankshaft main bearing cap bolts.





8. Measure the gauging plastic at its widest point.
^ Standard Oil Clearance: 0.020 - 0.040 mm (0.0008 - 0.0016 inch)
^ Maximum Oil Clearance: 0.060 mm (0.0023 inch)





9. If using a standard bearing, replace it with one having the same color. If the color of the bearing cannot be determined, select the correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft. Refer to bearing selection table Specifications.