Piston, Connecting Rod, and Bearing Removal

Tools Required

• J 24270  Cylinder Bore Ridge Reamer. See Special Tools and Equipment .
• J 41556  Connecting Rod Guide

Fig 1: Removing Cylinder Bore Ring Ridge
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The connecting rods and the bearing caps are NOT interchangeable.
1. Use the J 24270  in order to remove the cylinder bore ring ridge, if required. See Special Tools and Equipment .
   1. Turn the crankshaft until the piston is at the bottom of the stroke.
   2. Place a cloth on top of the piston.
   3. Use the J 24270  or equivalent in order to remove a cylinder ring ridge. See Special Tools and Equipment .
   4. Turn the crankshaft so the piston is at the top of the stroke.
   5. Remove the cloth.
   6. Remove the cutting debris from the cylinder and piston.
Fig 2: View Of Piston, Connecting Rod, Bearing Cap, Bearing Halves & Bolts
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
• Using a paint stick or etching tool, place match marks or numbers on the connecting rods and the connecting rod caps. The connecting rods and caps MUST be assembled to their original position and direction.
• A stamping mark on the side of the connecting rod, at the crank journal, may affect component geometry.
• Mark the top of the piston to the specific cylinder bore.
2. Remove the connecting rod bolts.
IMPORTANT: Mark, sort, or organize the connecting rod bearings so they may be installed to their original position and location.
3. Remove the connecting rod cap. Refer to Separating Parts  .
Fig 3: View Of J 41556 & Connecting Rod
Courtesy of GENERAL MOTORS CORP.
4. Install the J 41556  to the connecting rod.
Fig 4: View Of Piston & Connecting Rod Assembly
Courtesy of GENERAL MOTORS CORP.
5. Use a hammer and tap lightly on the end of the J 41556  in order to remove the piston and connecting rod assembly from the cylinder bore.
Fig 5: View Of Piston, Connecting Rod, Bearing Cap, Bearing Halves & Bolts
Courtesy of GENERAL MOTORS CORP.
6. Upon removal of the piston and connecting rod assembly, assemble the connecting rod cap and bolts onto the matching connecting rod.