Piston, Connecting Rod, and Bearing Installation

Tools Required

• J 8037  Piston Ring Compressor. See Special Tools and Equipment .
• J 36660-A  Torque Angle Meter. See Special Tools and Equipment .
• J 41742 Connecting Rod Guide Pin

Fig 1: Identifying J 41742
Courtesy of GENERAL MOTORS CORP.
1. Install the J 41742 into the connecting rod bolt 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 1052367 (Canadian P/N 992869):
   • Coat the piston.
   • Coat the piston rings.
   • Coat the cylinder bore.
   • Coat the bearing surfaces.
Fig 2: Compressing Piston Springs
Courtesy of GENERAL MOTORS CORP.
4. Perform the following steps to install the piston:
   1. Position the piston with the arrow on the piston head facing toward the front of the engine.
   2. Use the J 8037  to compress the piston rings. See Special Tools and Equipment .
   3. Place the piston in the cylinder (2).
   4. Lightly tap the piston into the cylinder bore while an assistant guides the connecting rod onto the crankshaft.
5. Remove the J 41742.
Fig 3: Removing & Installing Connecting Rod Caps
Courtesy of GENERAL MOTORS CORP.
6. Perform the following steps to install the connecting rod caps with bearings to the connecting rod:
   1. Install with the bumps on the connecting rod and the cap facing toward the rear of the engine.
   2. Coat the bearing surface with Engine Oil Supplement (EOS), GM P/N 1052367 (Canadian P/N 992869).
7. Use new connecting rod cap bolts.
NOTE: Refer to Fastener Notice in Cautions and Notices.
8. Install the connecting rod cap bolts.

   Tighten:  Tighten the connecting rod bearing cap bolts to 35 N.m (26 lb ft).

9. Use the J 36660-A  to rotate the main bearing cap bolts in the following sequence:

   Tighten: 

   1. The first pass rotate the connecting rod bearing cap bolts 45 degrees.
   2. The second pass rotate the connecting rod bearing cap bolts 15 degrees.

10. Repeat steps for the remaining pistons.