GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-45059 Torque Angle Sensor Kit
    • EN-48249 Piston Ring Compressor

For equivalent regional tools, refer to Special Tools .


    Object Number: 2028005  Size: SH
  1. Turn the piston rings before the installation to a position (A, B, C) as in the graphic shown.

  2. Object Number: 2028004  Size: SH
  3. The markings (1) on piston head must point to the timing side.

  4. Object Number: 2028000  Size: SH
  5. Lubricate the piston rings, piston (1), inner cylinder bore surface and EN-48249 compressor  (2) with clean engine oil.

  6. Object Number: 2027987  Size: SH
  7. Install the 4  pistons with 4 connecting rods (1) push down into the engine block.
  8. Install the connecting rod bearings (4) to the connecting rod bearing caps (2).
  9. Note: Take extreme care to prevent any scratches or damages to the connecting rod bearings.

  10. Install the 8 connecting rod bearings (4).
  11. Caution: Refer to Fastener Caution in the Preface section.

  12. Install the 8 connecting rod bearing cap bolts (3) and tighten in two passes:
  13. 7.1. In first pass tighten to  25 N·m (19 lb ft)
    7.2. In second pass tighten to  90 degrees using the EN-45059 angle sensor .