GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-46745 Piston Pin Retainer Remover and Installer


    Object Number: 637736  Size: SH
  1. Lubricate the piston pin with clean engine oil.

  2. Object Number: 1723224  Size: SH

    Note: The oil hole, in the connecting rod, should be facing the exhaust side of the block.

  3. Install one of the piston pin retainers into the retainer groove using EN-46745 installer .

  4. Object Number: 637738  Size: SH
  5. Install the connecting rod and piston pin. Push the piston pin in until it bottoms against the installed piston pin retainer.

  6. Object Number: 637736  Size: SH
  7. Install the second piston pin retainer.

  8. Object Number: 1657353  Size: SH

    Caution: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.

    Note: The piston ring end gaps must be staggered 90 degrees apart.

  9. Install the following components of the bottom ring assembly (oil control ring).
  10. 5.1. The expander
    5.2. The lower oil control ring
    5.3. The upper oil control ring

    Object Number: 1657354  Size: SH
  11. Install the middle ring (compression ring) with the napier groove facing down.
  12. Install the top ring.