2008 Arctic Cat ThunderCat ATV Service Manual, Page 52Get this manual
33Lubricate the camshaft journals and lobes with engine oil; then place the valve cover into position GZ201
NOTE: At this point, the rocker arms and adjuster screws must not have pressure on them
34Install the top side cap screws with rubber washers; then install the remaining cap screwsTighten only until snug
31Loosen the four adjuster screw jam nuts; then loosen the four adjuster screws on the rocker arms in the valve cover