Piston and Connecting Rod Assemble
Piston and Connecting Rod AssemblePiston and Piston Pin Installation Procedure
1. Properly orient the piston (1) on the connecting rod (2) as follows:
^ The locating mark (4) cast into the underside of the piston should point towards the front of the engine.
^ The locating notch (3) on the connecting rod cap should be pointing towards the rear of the engine on odd-numbered cylinders and towards the front of the engine on even-numbered cylinders.
2. Lubricate the piston pin bores in the piston and connecting rod with GM prelube lubricant GM P/N 1052367 or equivalent.
3. Align the piston pin bore with the connecting rod pin bore.
4. Slide the piston pin (4) into the piston and the connecting rod (3).
Important: New piston pin retainers must be used. Never reuse the piston pin retainers.
5. Install NEW piston pin retainers (1).
6. Ensure that the piston pin retainers are fully seated in their grooves.
7. Repeat these procedures for the remaining pistons.