Buick 10166355 Rod Assembly, Valve Push (152Mm) *Gree*Green Inside Diameter

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It should be open.

To remove the rocker arm covers, start by removing the rocker arm mounting nuts one at a time and detach the rocker arms, nuts, and pivot balls. Store each set of rocker arm components separately in a marked plastic bag. If you only need to remove the pushrods, loosen the rocker arm nuts and turn the rocker arms to allow room for pushrod removal. Remove the pushrods and store them separately. Inspect each rocker arm for wear, cracks, and other damage, especially where the pushrods and valve stems make contact. Check the pivot seat in each rocker arm and the pivot ball faces for galling, stress cracks, and unusual wear patterns. Replace worn or damaged rocker arms with new ones and install new pivot balls. Ensure the hole at the pushrod end of each rocker arm is open. Inspect the pushrods for cracks and excessive wear at the ends. Roll each pushrod across a piece of plate glass to check for bending. Lubricate the lower end of each pushrod and install them in their original locations, making sure they seat completely in the lifter socket. 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 and install the rocker arms, pivot balls, and nuts, tightening the nuts while ensuring the pushrods engage properly. Finally, install the rocker arm covers.