Piston and Connecting Rod Disassemble

Special Tools 

EN-46745:  Piston Pin Clip Remover/Installer

For equivalent regional tools, refer to Special Tools .

Fig 1: Removing/Installing Piston Rings
Courtesy of GENERAL MOTORS CORP.
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 Retainers
Courtesy of GENERAL MOTORS CORP.
NOTE: Be careful not to nick or gouge the piston or the retaining ring groove with the screwdriver if the piston is to be reused.
2. Using the EN-46745:  remover/installer, pry out the piston pin retainers by using the removal access notch in the side of the piston.
3. Discard the old piston pin retainers.
Fig 3: Piston & Connecting Rod Assembly
Courtesy of GENERAL MOTORS CORP.
4. Slide the piston pin (4) out of the piston. The piston will disconnect from the connecting rod (2).