Piston, Connecting Rod, and Bearing Removal

Special Tools 

EN-51140  Crankshaft Fixing Tool

For equivalent regional tools, refer to Special Tools .

1. Courtesy of GENERAL MOTORS COMPANY

   Remove and DISCARD the 4 connecting rod bearing cap bolts (3) from the cylinder 2 and the cylinder 3.

NOTE:

Lay aside in the order as they was removed.

NOTE:

The shear surfaces of the connecting rod and the connecting rod bearing cap form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

2. Remove the 2 connecting rod bearing caps (2) from the cylinder 2 and the cylinder 3.
NOTE:

Lay aside in the order as they was removed.

3. Remove the 2 connecting rod lower bearings (1).

4. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   Lay aside in the order as they was removed.

   Push the 2 pistons (1) with the 2 connecting rods (2) out of the cylinder 2 and the cylinder 3 upwards.

NOTE:

Lay aside in the order as they was removed.

5. Remove the 2 connecting rod upper bearings (3) from the 2 connecting rods (2).

6. Courtesy of GENERAL MOTORS COMPANY

   Remove the 2 bolts (3).

7. Remove the EN-51140  fixing tool (2).

8. Courtesy of GENERAL MOTORS COMPANY

   Install the 4 crankshaft pulley bolts (1).

9. Set the cylinder 2 to TDC. Rotate the crankshaft 180 degrees, use a pry bar at the 4 crankshaft pulley bolts (1).

10. Courtesy of GENERAL MOTORS COMPANY

    Remove and DISCARD the 4 connecting rod bearing cap bolts (3) from the cylinder 1 and the cylinder 4.

NOTE:

Lay aside in the order as they was removed.

NOTE:

The shear surfaces of the connecting rod and the connecting rod bearing cap form a unique fit and must not be swapped or damaged. Do not lay down on the shear surfaces.

11. Remove the 2 connecting rod bearing caps (2) from the cylinder 1 and the cylinder 4.
NOTE:

Lay aside in the order as they was removed.

12. Remove the 2 connecting rod lower bearings (1).

13. Courtesy of GENERAL MOTORS COMPANY

    NOTE:

    Lay aside in the order as they was removed.

    Push the 2 pistons (1) with the 2 connecting rods (4) out of the cylinder 1 and the cylinder 4 upwards.

NOTE:

Lay aside in the order as they was removed.

14. Remove the 2 connecting rod upper bearings (3) from the 2 connecting rods (4).