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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Engine Mechanical - 6.6L - Off Vehicle Repair Instructions (2 Of 3)) >> Off-Vehicle Repair Instructions (Part 2) >> Crankshaft and Bearings Cleaning and Inspection >> Crankshaft Bearing Selection Plastic Gage Method >> Tools Required

Tools Required

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J 45059  Angle Meter

  1. Clean the cylinder block bearing fitting surfaces.
  2. Clean the crankshaft and upper bearings (1) and lower bearings (2).
    Fig 1: View Of Crankshaft Upper & Lower Bearings
    GM663789Courtesy of GENERAL MOTORS CORP.
  3. Install the bearings into the cylinder block and the bearing caps.
  4. Install the crankshaft into the cylinder block.
    Fig 2: View Of Crankshaft & Cylinder Block
    GM663790Courtesy of GENERAL MOTORS CORP.
  5. Rotate the crankshaft approximately 30 degrees to seat the bearings.
  6. Place the plastic gage over the crankshaft journal across the full width of the bearing. Note: Do not allow the crankshaft to rotate at any time during bearing cap installation and tightening or the plastic gauge measurement will be inaccurate.
    Fig 3: View Of Plastic Gage Over Crankshaft Journal
    GM500655Courtesy of GENERAL MOTORS CORP.
  7. Install the crankshaft bearing caps.
    Fig 4: View Of Crankshaft Bearing Caps
    GM663793Courtesy of GENERAL MOTORS CORP.
  8. NOTE: Refer to FASTENER NOTICE .
  9. Install the crankshaft bearing cap bolts.
  10. Tighten the crankshaft bearing cap bolts in the proper sequence.
    Fig 5: Identifying Crankshaft Bearing Cap Bolt Tightening Sequence
    GM663796Courtesy of GENERAL MOTORS CORP.

    Tighten: 

    • 1st step 98 N.m (72 lb ft).
    • 2nd step 132 N.m (97 lb ft).
    • 3rd step 30 degrees using J 45059  .

  11. Install the crankshaft bearing cap side bolts.

    Tighten:  Tighten the crankshaft bearing cap side bolts in the proper sequence to 70 N.m (52 lb ft).

    Fig 6: Identifying Crankshaft Bearing Cap Side Bolts Tightening Sequence
    GM663798Courtesy of GENERAL MOTORS CORP.
  12. Remove the crankshaft bearing cap bolts.
  13. Remove the crankshaft bearing caps.
  14. Compare the width of the plastic gauge with the scale printed on the plastic gauge container.
    Fig 7: Measuring Compressed Width
    GM500656Courtesy of GENERAL MOTORS CORP.
  15. Select the crankshaft bearing grade that provides the proper oil clearances. The production specification for crankshaft bearing clearance is 0.039-0.070 mm (0.0015-0.0028 in) and the service limit is 0.014 mm (0.0055 in).