Probably about time-rocker adjustment

uh, spinning pushrods is a good thing. It means the lifters are spinning, which they should do, also. The lifters have a slightly crowned surface on their bottoms and the cam lobes have a very slight taper across their faces, so the lifters contact near the edge of the lobe, thus spinning them. This action limits the friction & wear on these things. Therefore the lifter/cam lobe don't grind themselves down. If you don't know this, and you don't know if you have an hydraulic or solid lifter cam, maybe you should seek some hands-on help, locally.