GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN-46745 Piston Pin Clip Remover/Installer
    • EN-46745-4 Piston Pin Clip Remover/Installer Adapter

    Object Number: 483298  Size: SH

    Important: Install the piston onto the connecting rod with the arrow oriented toward the front of the engine.

  1. Assemble the connecting rod and the piston.

  2. Object Number: 1769814  Size: SH

    Notice: Install the piston pin retainers correctly in the retaining groove during assembly in order to avoid engine damage.

  3. Use the following procedure to assemble the piston pin and the retainer:
  4. 2.1. Coat the piston pin with oil.
    2.2. Using the EN-46745 and the EN-46745-4 , install one side of one piston pin retainer into the retaining groove. Rotate the retainer until it is fully seated in the groove.
    2.3. Install the connecting rod and the piston pin. Push the piston pin until it bottoms in the previously installed retainer.
    2.4. Using the EN-46745 and the EN-46745-4 , install the second piston pin retainer.
    2.5. Ensure that the piston moves freely.

    Object Number: 4967  Size: SH

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

  5. Install the following components of the oil control ring assembly - bottom ring:
  6. 3.1. The expander
    3.2. The lower oil control ring
    3.3. The upper control ring
  7. Install the lower compression ring - second ring. Place the manufacturer's mark facing up.
  8. Install the upper compression ring - top ring.