GM 96069422 Cylinder Head

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Allow the engine to cool completely before following this procedure. Position the number one piston at Top Dead Center. Disconnect the negative cable from the battery. Drain the cooling system and remove the spark plugs. Remove the intake manifold. Remove the exhaust manifold. Remove the distributor, including the cap and wires. On carbureted models, remove the fuel pump. Remove the timing belt. Remove the camshaft cover. On 16-valve engines, also remove the camshaft and intake rocker arms. Using a 14 mm socket, loosen the cylinder head bolts, 1/4-turn at a time, in the reverse of the sequence shown until they can be removed by hand. Carefully lift the cylinder head straight up and place the head on wooden blocks to prevent damage to the sealing surfaces. If the head sticks to the engine block, dislodge it by prying against a protrusion on the head casting. Note: Cylinder head disassembly and inspection procedures are covered in Part B. It's a good idea to inspect the camshaft and have the head checked for war page, even if you're just replacing the gasket. Remove all traces of old gasket material from the block and head. Do not allow anything to fall into the engine. Clean and inspect all threaded fasteners and be sure the threaded holes in the block are clean and dry. Place a new gasket and the cylinder head in position. The cylinder head bolts should be tightened in several stages following the proper sequence to the torque. Reinstall the timing belt. Reinstall the remaining parts in the reverse order of removal. Be sure to refill the cooling system and check all fluid levels. Rotate the crankshaft clockwise slowly by hand through two complete revolutions. Recheck the camshaft timing marks. Start the engine and set the ignition timing. Run the engine until normal operating temperature is reached. Check for leaks and proper operation. Shut off the engine, remove the camshaft cover and retorque the cylinder head bolts, unless the gasket manufacturer states otherwise. Recheck the valve adjustment.

Clean the block and head, install knock pins, and place a new gasket.

To effectively clean a cylinder head and associated components during an engine overhaul, follow these steps:Remove old gasket material and sealant from head gasket, intake manifold, and exhaust manifold surfaces.Clear accumulated scale from coolant passages.Eliminate deposits from holes using a stiff wire brush.Clean threaded holes with an appropriate-sized tap.Use compressed air to remove debris.Clean rocker arm shaft oil holes.Utilize solvent to clean and dry the cylinder head and components.Consider using caustic decarbonizing chemicals with caution.

Use a valve spring compressor to compress the springs.

Before removing valves from a SOHC cylinder head, arrange to label and store them, along with their related components, so they can be kept separate and reinstalled in the same valve guides they were removed from. Use a spring compressor to compress the springs, remove the keepers, then carefully release the compressor to remove the retainer, spring, spring seat, and valve. Also, remove the oil seal from the guide.