Tools Required

J 45059  Angle Meter

Fig 1: View Of Thrust Bearing
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: If the crankshaft bearings have been used in a running engine, you must replace them with NEW crankshaft bearings for reassembly.
1. Clean the upper and lower crankcase crank bore with a lint-free cloth.
2. Clean all the oil from the backside of new bearing halves.
3. Install new upper crankshaft bearings into position. The thrust bearing (1) belongs in the number three journal. Be sure the upper bearing insert contains the oil transfer hole and groove. Roll the bearing into position so that the lock tang engages the crank slot. The bearing must fit flush with the upper crankcase.
Fig 2: View Of Lower Main Bearing Half
Courtesy of GENERAL MOTORS CORP.
4. Install new lower crankshaft bearings into position in the lower crankcase. The lower crankcase crankshaft bearings are identified by NO grooves or holes. The bearings must fit flush with the lower crankcase.
5. Apply a liberal amount of GM crankshaft prelube GM P/N 1052367, (Canadian P/N 992869), or engine oil to the upper and lower bearing surfaces.