Piston, Connecting Rod, and Bearing Removal

Special Tools

• J 24270:  Cylinder Bore Ridge Reamer
• J 41556:  Connecting Rod Guide

For equivalent regional tools, refer to Tools and Equipment .

Fig 1: Removing Cylinder Bore Ring Ridge
Courtesy of GENERAL MOTORS CORP.
1. Mark the piston with the number of the cylinder from which the piston is being removed.
2. Mark the connecting rod and the connecting rod cap in order to ensure correct assembly.
CAUTION: If there is a pronounced ridge at the top of the piston travel, the ridge must be removed with a ridge reamer before the piston and connecting rod assembly are removed. Applying force may break the piston rings or damage the piston.
3. Use the J 24270:  reamer in order to remove the cylinder bore ring ridge. Complete the following steps:
   1. Turn the crankshaft until the piston is at the bottom of the stroke.
   2. Cover the piston with a cloth.
   3. Remove the cylinder ring ridge.
   4. Turn the crankshaft until the piston is at the top of the stroke.
   5. Remove the cloth.
   6. Remove the metal shavings from the cylinder and piston.
Fig 2: View Of Connecting Rod Bolts
Courtesy of GENERAL MOTORS CORP.
4. Remove the connecting rod bolts.
5. Remove the connecting rod cap.
6. Remove the connecting rod bearing half.
7. Install J 41556:  guide into the connecting rod.
8. Remove the connecting rod and piston assembly from the engine with a suitable tool.