GM Service Manual Online
For 1990-2009 cars only

Tool Required

J 24270 Ridge Reamer

  1. Remove the cylinder head. Refer to Cylinder Head Removal.
  2. Remove the oil pan. Refer to Oil Pan Removal.

  3. Object Number: 4323  Size: SH
  4. Turn the crankshaft until the piston is a bottom dead center.
  5. 3.1. Place a cloth on top of the piston.
    3.2. Perform the cutting operation with the J 24270 .
    3.3. Turn the crankshaft until the piston is at top dead center.
    3.4. Remove the cloth and cuttings.

    Object Number: 4324  Size: SH
  6. Remove the connecting rod cap.
  7. Keep the connecting rod and the connecting rod cap together as mating parts.
  8. 5.1. Check the connecting rod and the connecting rod cap for identification marks.
    5.2. Mark the parts if necessary to keep each connecting rod and cap together.

    Object Number: 4325  Size: SH
  9. Remove the connecting rod bearings.

  10. Object Number: 4324  Size: SH
  11. Remove the connecting rod and the piston.
  12. 7.1. Slide a piece of 3/8 fuel or vacuum line over each connecting rod bolt. This protects the crankshaft journal during removal.
    7.2. Push the piston out of the bore.
    7.3. After removing the connecting rod and the connecting rod cap, assemble the connecting rod and the connecting rod cap. This helps keep the correct mating parts together.
  13. For cleaning and inspection information, refer to Piston and Connecting rod Clean and Inspect.