Pontiac 10166354 Rod Assembly, Valve Push (144Mm) *Yellow Inside Diameter

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Detach the rocker arm cover from the cylinder head. Starting at the front of the cylinder head, loosen the rocker arm nuts. If only the pushrods are being removed, rotate the rocker arms to one side so that the pushrods can be lifted out. Remove the nuts, rocker arms, and pivot balls, and store them in marked containers as they must be reinstalled in their original locations. Remove the pushrods and store them separately to ensure they don't get mixed up during installation. If the pushrod guides need to be removed for any reason, make sure they are marked so that they can be reinstalled in their original locations. Check each rocker arm for wear, cracks, and other damage, especially where the pushrods and valve stems come into contact with the rocker arm faces. Ensure that the hole at the pushrod end of each rocker arm is open. Inspect each rocker arm pivot area for wear, cracks, and galling. If the rocker arms are worn or damaged, replace them with new ones and use new pivot balls as well. Inspect the pushrods for cracks and excessive wear at the ends. Roll each pushrod across a piece of plate glass to check if it is bent. Lubricate the lower ends of the pushrods with clean engine oil or moly-base grease and install them in their original locations. Ensure that each pushrod is fully seated in the lifter socket. Apply moly-base grease to the ends of the valve stems and the upper ends of the pushrods before positioning the rocker arms and installing the nuts. Place the rocker arms in position, then install the pivot balls and nuts. Apply moly-base grease to the pivot balls to prevent damage to the mating surfaces before engine oil pressure builds up. Tighten the nuts.

Apply grease to the ends of the valve stems and the upper ends of the pushrods. Apply grease to the pivot balls to prevent damage.