GM Service Manual Online
For 1990-2009 cars only

Important: 

   • Disassembly of the piston, press fit design piston pin, and connecting rod may create scoring or damage to the piston pin and piston pin bore. If the piston, press-fit design pin, and connecting rod have been disassembled, replace the components as an assembly.
   • Many internal engine components will develop specific wear patterns on their friction surfaces.
   • When disassembling the engine, internal components MUST be separated, marked, or organized in a way to ensure installation to their original location and position.

Separate, mark, or organize the following components:

    • Piston and the piston pin
    • Piston to the specific cylinder bore
    • Piston rings to the piston
    • Connecting rod to the crankshaft journal
    • Connecting rod to the bearing cap
        A paint stick or etching/engraving type tool are recommended. Stamping the connecting rod or cap near the bearing bore may affect component geometry.
    • Crankshaft main and connecting rod bearings
    • Camshaft and valve lifters
    • Valve lifters, lifter guides, pushrods and rocker arm assemblies
    • Valve to the valve guide
    • Valve spring and shim to the cylinder head location
    • Engine block main bearing cap location and direction
    • Oil pump drive and driven gears