Piston, Connecting Rod, and Bearing Removal

Tools Required

• J 24270  Cylinder Bore Ridge Reamer or SA9187NE  Cylinder Ridge Reamer. See Special Tools .
• J 41742  Connecting Rod Guide Pin

Fig 1: View Of Piston
Courtesy of GENERAL MOTORS CORP.
1. Rotate the engine to position the piston (120) at bottom dead center (BDC) in the cylinder.
Fig 2: Removing Cylinder Ridge
Courtesy of GENERAL MOTORS CORP.
2. If a ridge of metal or hard carbon can be felt around the top of any cylinder, use the J 24270  , SA9187NE  , or equivalent, in order to remove the cylinder ridge. See Special Tools .
Fig 3: View Of Bolts, Cap, Pins & Lower Bearing Half
Courtesy of GENERAL MOTORS CORP.
3. Remove the bolts (115), cap (116), pins (128) and lower bearing half (117).
Fig 4: View Of Connecting Rod & Bearing
Courtesy of GENERAL MOTORS CORP.
4. Use the J 41742  in order to remove the piston and connecting rod assembly from the block.
5. Remove the upper bearing half from the connecting rod.
6. Install the cap onto the connecting rod and mark or sort the bearings for assembly. Refer to Separating Parts .