Piston, Connecting Rod, And Bearing Removal

Special Tools 

EN-51140  Crankshaft Fixing Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Cylinder 2 And 3 Connecting Rod Caps, Bolts And Lower Bearings
Courtesy of GENERAL MOTORS COMPANY
1. 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).
Fig 2: Cylinder 2 And 3 Piston/Connecting Rod Assemblies And Upper Bearings
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Lay aside in the order as they was removed.

4. 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).
Fig 3: Crankshaft Fixing Tool
Courtesy of GENERAL MOTORS COMPANY
6. Remove the 2 bolts (3).
7. Remove the EN-51140  fixing tool (2).
Fig 4: Crankshaft Pulley Bolts
Courtesy of GENERAL MOTORS COMPANY
8. 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).
Fig 5: Cylinder 1 And 4 Connecting Rod Caps, Bolts And Lower Bearings
Courtesy of GENERAL MOTORS COMPANY
10. 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).
Fig 6: Cylinder 1 And 4 Piston/Connecting Rod Assemblies And Upper Bearings
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Lay aside in the order as they was removed.

13. 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).