Piston and Connecting Rod Disassemble

Special Tools 

EN-46745  Piston Pin Clip Remover/Installer

For equivalent regional tools, refer to Special Tools .

Fig 1: Piston Ring Expander
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

You must use a piston ring expander to remove and install the piston rings. Only expand the rings far enough to fit over the piston lands. If the rings are overexpanded, the top ring will shatter and the others will distort.

1. Remove the piston rings using a piston ring expander. Place each ring in a clean shop towel for storage.
Fig 2: Piston Pin Retainer Access Notch
Courtesy of GENERAL MOTORS COMPANY
NOTE:
• The connecting rod is non-directional and may be assembled/reassembled to the piston in either direction.
• DO NOT reuse the piston pin retainers.
2. Using the EN-46745  remover/installer, remove the piston pin retainers by using the removal access notch (1) in the side of the piston. Discard the piston pin retainers.
Fig 3: Piston Pin
Courtesy of GENERAL MOTORS COMPANY
3. Slide the piston pin out of the piston. The piston will disconnect from the connecting rod.