GM Service Manual Online
For 1990-2009 cars only

Important: 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 lash adjusters
    • Rocker arm position onto the rocker arm shafts
    • Valve to the valve guide
    • Engine block main bearing cap location and direction
    • Oil pump drive and driven gears