GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 24270 Ridge Reamer


    Object Number: 60874  Size: SH
  1. Mark the piston with the number of the cylinder from which it is being removed.
  2. Mark the connecting rod and the rod cap so that they can be assembled correctly.
  3. Turn the crankshaft to bottom dead center.
  4. Notice: If there is a pronounced ridge at the top of the piston travel, the ridge must be removed with a ridge reamer before the piston and connecting rod assembly are removed. Applying force may break the piston rings or damage the piston.

  5. Cover the piston with a shop towel.
  6. Remove the cylinder ridge, use the J 24270 if necessary.
  7. Remove the shop towel and metal shavings from the cylinder.
  8. Clean the carbon from the top end of the cylinder.
  9. Clean any metal shavings from cylinder bore.
  10. Remove the connecting rod nut and cap.
  11. Notice: Install thread protector in order to avoid damage to the crankshaft journal.

  12. Remove the connecting rod and piston assembly. Push it out with a suitable tool.