GM Service Manual Online
For 1990-2009 cars only

Special Tools

    â€¢ EN-46745 Piston Clip Retainer Remover/Installer
    â€¢ EN-46745-4 Piston Clip Retainer Remover/Installer Adapter

    Object Number: 1769819  Size: SH

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

  1. Disassemble the piston rings. Use a suitable tool to expand the rings. The piston rings must not be reused.

  2. Object Number: 1769814  Size: SH

    Important: 2 retainers hold the piston pins in place. No special tools are required to remove the piston pins. Ensure that the piston pin is not damaged. Do not reuse the retainers.

  3. Remove the piston pin retainers using the EN-46745 and the EN-46745-4 .

  4. Object Number: 1769821  Size: SH
  5. Remove the piston pin.