GM Service Manual Online
For 1990-2009 cars only

    Object Number: 217427  Size: SH
  1. Perform the following steps to assemble the piston to the connecting rod:
  2. 1.1. The arrow on top of the piston must point toward the front of the engine.
    1.2. The bumps on the connecting rod must face towards the flywheel.
    1.3. Install the piston pin.
    1.4. Install the piston pin retaining clips to the piston.

    Object Number: 217425  Size: SH
  3. Perform the following steps to install the piston rings:
  4. 2.1. Align the number one compression ring gap at 6 o'clock (1).
    2.2. Align the number two compression ring gap at 12 o'clock (2).
    2.3. Align the upper oil control ring gap at 1 o'clock (3).
    2.4. Align the oil control ring spacer gap at the 9 o'clock (4).
    2.5. Align the lower oil control ring gap at the 5 o'clock (5).

Tools Required

SA9101E Piston Pin Remover/Installer


    Object Number: 894221  Size: SH
  1. Perform the following steps to assemble the piston assembly to the connecting rod.
  2. Install the oil ring expander and the 2 side rails by hand.
  3.    Important: The arrow on the top of the piston must point toward the front of the engine.

    • Align the number 1 compression ring gap at 6 o'clock (1).
    • Align number 2 compression ring gap at 12 o'clock (2).
    • Align the upper oil control side rail gap at 1 o'clock (3).
    • Align the oil ring spacer expander at 9 o'clock (4).
    • Align the lower oil control side rail gap at 5 o'clock (5).

    Object Number: 894222  Size: SH

    Important: The bumps on the connecting rod must face toward the flex plate.

  4. Assemble the piston to the connecting rod.

  5. Object Number: 877263  Size: SH

    Important: The arrow on the piston points toward the front of the engine and the bump on the connecting rod faces toward the rear of the engine.

  6. Use the SA9101E to assemble the piston pin to the connecting rod and the piston, if necessary.

  7. Object Number: 896481  Size: SH
  8. Install the piston pin clips in the piston.