GM Service Manual Online
For 1990-2009 cars only

Use a rubber mallet or a similar soft-headed hammer to separate components. Gently tap the part sideways to loosen the components.

Important: 

   • Tapping a component loose should be done at bends or on the reinforced areas to prevent distortion of the parts.
   • Do not use screwdrivers or similar between joints to pry them apart as this will damage the sealing surfaces.

Many internal engine components will develop specific wear patterns on their friction surfaces. The internal components when separated, must be marked or organized in a way to ensure they are reinstalled to their original location and position.

Separate, mark or organize the following components:

    • Piston and piston pin
    • Piston to the specific cylinder bore
    • Piston rings to the specific piston
    • Connecting rod to the crankshaft journal
    • Connecting rod to the bearing cap
    • Crankshaft main and connecting rod bearings
    • Camshaft and hydraulic valve lifters
    • Hydraulic valve lifters, guides, pushrods, pivot supports and rocker arms
    • Hydraulic valve to the valve guide
    • Hydraulic valve spring and where fitted, the shim to the cylinder head location
    • Cylinder block main bearing cap location and direction
    • Oil pump drive gears