Lower Crankcase Installation

Tools Required 

J 36660-A  Torque Angle Meter

1. Install the crankshaft bearings and lubricate bearing surfaces with engine oil.
   Fig 1: Crankshaft Bearings

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2. Install the crankshaft on the journals.
   Fig 2: Crankshaft

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3. Apply sealer GM P/N 12346286 (Canadian P/N 10953477) to the surfaces of the engine block to bedplate mating surfaces.
   Fig 3: Applying Sealer To Surfaces Of Engine Block-To-Bedplate Mating Surfaces

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4. Install the lower bearing halves, without grooves, into the lower crankcase. Apply oil to bearing surfaces.
   Fig 4: Lower Bearing Halves

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

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6. Install the NEW crankshaft bearing bolts in sequence finger tight.
   1. 6.1. Tighten the crankshaft bearing bolts in sequence.

      Tighten 

      Tighten the crankshaft bearing bolts to 20 N.m (15 lb ft).

   2. 6.2. Tighten the crankshaft bearing bolts in sequence.

      Tighten 

      Tighten the crankshaft bearing bolts 70 degrees using the torque angle meter.

   Fig 6: Tightening Crankshaft Bearing Bolts In Sequence

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7. Tighten the lower crankcase perimeter bolts in sequence.

   Tighten 

   Fig 7: Tightening Lower Crankcase Perimeter Bolts In Sequence

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   Tighten the lower crankcase perimeter bolts to 25 N.m (18 lb ft).