Lower Crankcase Installation

Tools Required 

J 45059  Angle Meter. See Special Tools .

Fig 1: View Of Crankshaft Bearing Inserts
Courtesy of GENERAL MOTORS CORP.
1. Install the upper crankshaft bearings and lubricate bearing surfaces with engine oil.
Fig 2: Installing Crankshaft On Journals
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2. Install the crankshaft on the journals.
Fig 3: Identifying Crankshaft Bearing Inserts
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3. Install the lower bearing halves, without grooves, into the lower crankcase. Apply oil to bearing surfaces.
Fig 4: Applying Sealer To Surfaces Of Engine Block To Bedplate Mating Surfaces
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4. Apply sealer GM P/N 12346286 (Canadian P/N 10953472) to the surfaces of the engine block to bedplate mating surfaces.
Fig 5: View Of Upper & Lower Crankcase W/Bolts
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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 6: Identifying Crankshaft Bearing Bolt Tightening Sequence
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NOTE: Refer to Fastener Notice in Cautions and Notices.
6. Install the NEW crankshaft bearing bolts in sequence finger tight.
   1. Tighten the crankshaft bearing bolts in sequence.

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

   2. Tighten the crankshaft bearing bolts in sequence using the J 45059  . See Special Tools .

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

Fig 7: Lower Crankcase Perimeter Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.
7. Tighten the lower crankcase perimeter bolts in sequence.

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