GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 45059 Angle Meter


    Object Number: 334338  Size: SH
  1. Install the crankshaft bearings into the engine block.
  2. Apply clean engine oil to the crankshaft bearings.

  3. Object Number: 334336  Size: SH
  4. Apply clean engine oil to the crankshaft bearing journals.
  5. Install the crankshaft.

  6. Object Number: 334342  Size: SH
  7. Install the crankshaft bearings into the crankshaft bearing caps.
  8. Apply clean engine oil to the crankshaft bearings.

  9. Object Number: 334329  Size: SH
  10. Install the crankshaft bearing caps in the original position and with the arrow on the crankshaft bearing caps in the direction of the front of the engine block.
  11. Install the NEW crankshaft bearing cap bolts until snug.
  12. Thrust the crankshaft rearward in order to set and align the crankshaft thrust bearings and the crankshaft bearing caps.
  13. Thrust the crankshaft forward in order to align the rear faces of the crankshaft thrust bearings.
  14. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  15. Tighten the crankshaft bearing cap bolts.
  16. Tighten

    1. Tighten the crankshaft bearing cap bolts on the first pass to 20 N·m (15 lb ft).
    2. Tighten the crankshaft bearing cap bolts on the final pass an additional 73 degrees using the J 45059 .

    Object Number: 188467  Size: SH
  17. Measure the crankshaft end play.
  18. 12.1. Firmly thrust the crankshaft rearward, and then forward.

    This will align the crankshaft rear bearing thrust surfaces.

    12.2. With the crankshaft pushed forward, insert a feeler gage between the crankshaft and the crankshaft rear bearing thrust surface to measure the clearance.

    Specification
    Crankshaft end play 0.05-0.20 mm (0.002-0.008 in)

  19. Rotate the crankshaft in order to check for binding.
  20. A bent crankshaft or lack of proper crankshaft bearing clearance may cause binding.

  21. If the crankshaft does not turn freely, loosen the crankshaft bearing cap bolts on 1 crankshaft bearing cap at a time in order to determine the location of the binding.
  22. A lack of proper crankshaft bearing clearance may be caused by the following:

    • Burrs on the crankshaft bearing cap
    • Foreign material between the crankshaft bearing and the engine block
    • Foreign material between the crankshaft bearing and the crankshaft bearing cap
    • Damaged crankshaft bearing
    • Improper size crankshaft bearing