45. Lower Crankcase Installation

Lower Crankcase Installation

^ Tools Required
- J 36660-A Torque Angle Meter





1. Install the crankshaft bearings and lubricate bearing surfaces with engine oil.





2. Install the crankshaft on the journals.





3. Apply sealer GM P/N United States 12346286, GM P/N Canada 10953477 to the surfaces of the engine block to bedplate mating surfaces.





4. Install the lower bearing halves, without grooves, into the lower crankcase. Apply oil to bearing surfaces.





5. Install the lower crankcase. Tap gently into place with a suitable tool if necessary. Ensure it is aligned properly on the dowels.

Notice: Refer to Fastener Notice in Service Precautions.





6. Install the crankshaft bearing bolts in sequence finger tight.
6.1. Tighten the crankshaft bearing bolts in sequence.
Tighten
Tighten the crankshaft bearing bolts to 20 Nm (15 ft. lbs.).
6.2. Tighten the crankshaft bearing bolts in sequence.
Tighten
Tighten the crankshaft bearing bolts 70 degrees using the torque angle meter.





7. Tighten the lower crankcase perimeter bolts in sequence.
Tighten the lower crankcase perimeter bolts to 25 Nm (18 ft. lbs.).