Piston and Connecting Rod Disassemble

Special Tool 

EN-49941  Remover/Installer Piston Retainer Ring

For equivalent regional tools, refer to Special Tools .

1. Remove the piston rings. Use piston ring pliers (1)
   Fig 1: Using Piston Ring Pliers

   Courtesy of GENERAL MOTORS COMPANY
   WARNING: Handle the piston carefully. Worn piston rings are sharp and may cause bodily injury.
2. The piston rings are ordered as followed:
   Fig 2: Upper Compression Ring, Lower Compression Ring, Oil Rings And Oil Ring Spacer

   Courtesy of GENERAL MOTORS COMPANY
   • Upper compression ring (1)
   • Lower compression ring (2)
   • Oil rings and oil ring spacer (3) and (4)
3. Install the piston and connecting rod assembly to a bench vise. Use aluminum braces
4. Apply the EN-49941  remover (1) in the notch (3) to the piston pin retainer (2) and remove it.
   Fig 3: Piston Pin Retainer, Remover And Notch

   Courtesy of GENERAL MOTORS COMPANY
   WARNING: Use extreme care when removing snap rings. Always wear adequate eye protection in order to avoid personal injury.
5. Remove the piston pin (2) and the connecting rod (3) from the piston (1).
   Fig 4: Connecting Rod, Piston And Piston Pin

   Courtesy of GENERAL MOTORS COMPANY