GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1291387  Size: SH
  1. Inspect the connecting rod for bending or twisting. If the connecting rod is bent or twisted, replace the connecting rod.
  2. Inspect the connecting rod bearings.
  3. Inspect the connecting rod lower end for wear.
  4. Inspect the connecting rod upper end for scoring.
  5. Inspect the crankshaft rod bearing journal for wear. Refer to Engine Mechanical Specifications .
  6. Inspect the piston for scoring, cracks, and wear.
  7. Inspect the piston for taper using a micrometer.

  8. Object Number: 1291388  Size: SH
  9. Inspect the piston for fit to the connecting rod.

  10. Object Number: 1289362  Size: SH
  11. Inspect the engine block deck surface for flatness using a straight edge and a feeler gage. Refer to Engine Mechanical Specifications .
  12. Inspect the bearing bore for concentricity and alignment using a bore gauge. Refer to Engine Mechanical Specifications . If the bearing bore is beyond specifications, replace the engine block.
  13. Inspect the engine block cylinder bore for wear, runout, ridging and taper using a bore gage. Refer to Engine Mechanical Specifications .
  14. Inspect the engine block cylinder bore for glazing. Lightly hone the cylinder bore as necessary.