GM Service Manual Online
For 1990-2009 cars only

    Object Number: 261801  Size: SH

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

    Coat the piston pin with engine oil.

    Push the piston pin into the piston pin bore by hand.

  1. Assemble the connecting rod (3) and the piston (1).

  2. Object Number: 166696  Size: SH

    Important: Be sure that the end gap of the piston pin snap ring is not aligned with the pin hole cutout portion of the piston.

  3. Install new snap rings (1) using a small screwdriver.
  4. Notice: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.


    Object Number: 261803  Size: SH
  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). Place the manufacturer's mark facing up.

  9. Object Number: 261806  Size: SH

    Important: After installing the three rings, be sure that the end gaps of the piston rings are distributed properly.

  10. Coat the installed piston rings with oil.