GM Service Manual Online
For 1990-2009 cars only

Tools Required

EN-46745 Piston Pin Retainer Remover and Installer


    Object Number: 637689  Size: SH

    Caution: Handle the piston carefully. Worn piston rings are sharp and may cause bodily injury.

    Important: Do not reuse the piston rings.

  1. Remove the piston rings using a piston ring expander.

  2. Object Number: 637736  Size: SH

    Important: Two retainers hold the piston pins in place. Reuse the retainers if they are not damaged during removal.

  3. Remove the piston pin retainers.

  4. Object Number: 637738  Size: SH
  5. Remove the piston pin.