GM Service Manual Online
For 1990-2009 cars only

Press-Fit Piston Pin

Tools Required

J 24086-C Piston Pin Remover/Installer Set


    Object Number: 1366359  Size: SH

    Important: 

       • Disassembly of the piston, press-fit design piston pin, and connecting rod may create scoring or damage to the piston pin and piston pin bore. If the piston, pin, and connecting rod have been disassembled, replace the components as an assembly.
       • The disassembly procedure, as shown, is to be used for diagnostic purposes only.

  1. Remove the connecting rod bearings (3) from the rod (2) and cap (4).

  2. Object Number: 490763  Size: SH
  3. Using piston ring pliers, remove the piston rings from the piston.

  4. Object Number: 533477  Size: SH
  5. Install fork insert J 24086-920A into J 24086-10 .

  6. Object Number: 533478  Size: SH
  7. Install the piston and connecting rod assembly onto J 24086-10 .
  8. Install J 24086-107 to the piston pin.
  9. Install J 24086-88A through the fixture and to the J 24086-107.

  10. Object Number: 533480  Size: SH

    Notice: After the installer hub bottoms on the support assembly, do not exceed 35 000 kPa (5,000 psi) pressure, this could cause damage to the tool.

  11. Press the piston pin from the piston and connecting rod assembly.

Full-Floating Piston Pin


    Object Number: 1366359  Size: SH
  1. Remove the connecting rod bearings (3) from the rod (2) and cap (4).

  2. Object Number: 490763  Size: SH
  3. Using piston ring pliers, remove the piston rings from the piston.

  4. Object Number: 1366364  Size: SH
  5. Rotate the piston pin retaining clips until the ring end gap is positioned in the cutout area (1) of the pin bore.

  6. Object Number: 1366368  Size: SH
  7. Remove the clips starting in the cutout area of the pin bore.

  8. Object Number: 35866  Size: SH
  9. Remove the pin from the piston and connecting rod.
  10. The piston and pin are a matched set and are not to be serviced separately.
  11. Mark, sort, or organize the piston and the matching piston pin.