318 la help

have to check everything
retainers/ keepers hitting the valve stem seals
worse case a valve could be tagging a piston

when you roll it over does the motion of the rockers look symetrical tilt up vs tilt down as you go around
i.e a line through the center of the shaft to the valve tip/ rocker = a right angle- 90 degrees you can eyeball with a machinist scale or eyeball both sides of the retainer over to the shaft- does that eyeline hit the middle of the shaft?