46. Piston, Connecting Rod, and Bearing Installation

^ Tools Required
- J 41742 Connecting Rod Guide Pin
- J 8037 Piston Ring Compressor





1. Install the J 41742 onto the connecting rod hole which will allow the guide pin to clear the crankshaft bearing bridge.
Only one J 41742 is required to properly align the connecting rod with crankshaft.
2. Install the upper rod bearing to the rod.
3. Coat the following components with Engine Oil Supplement (EOS), GM P/N 1052368:
^ Coat the piston.
^ Coat the piston rings.
^ Coat the cylinder bore.
^ Coat the bearing surfaces.





4. Perform the following steps to install the piston:
4.1. Position the piston with the arrow on the piston head facing toward the front of the engine.
4.2. Use the J 8037 to compress the piston rings.
4.3. Place the piston in the cylinder (2).
4.4. Lightly tap the piston into the cylinder bore while an assistant guides the connecting rod onto the crankshaft.
5. Remove the J 41742.
6. Perform the following steps to install the connecting rod caps with bearings to the connecting rod:
6.1. Install with the bumps on the connecting rod and the cap facing toward the rear of the engine.
6.2. Coat the bearing surface with Engine Oil Supplement (EOS), GM P/N 1052368.
7. Use new connecting rod cap bolts.

Notice: Refer to Fastener Notice in Service Precautions.

8. Install the connecting rod cap bolts.
^ Tighten the connecting rod bearing cap bolts to 35 Nm (26 ft. lbs.) on the first pass, 45 degrees on the second pass and 15 degrees on the third pass.
9. Repeat steps for the remaining pistons.