Clean the valve train components in parts cleaning solvent.
Carb cleaner or a spray type gasket remover can be used to remove stubborn deposits.
Mark position of the rocker arms on the shafts. Remove the rocker arm retainers with pliers. Then remove the arms and examine the shafts for wear, grooving, or surface cracks. Check the rocker arms for cracks at the shaft bores and for wear at the valve and push rod contact points. Replace worn, or damaged parts as needed.
Check the pushrods for wear, or distortion. Replace any push rod exhibiting wear (at either end), or if bent, or kinked.
NOTE: The rocker arm end of each pushrod is identified with a paint stripe. The ball at this end is also coated or heat treated giving it a distinctive copper color.
