2007 Arctic Cat Four-Stroke Factory Service Manual, Page 89Get this manual
! NOTE: Carefully rotate the crankshaft several times to make sure there is no binding and that no valves are making contact with the pistons
40Using suitable driving tool, install the oil seal into the timing chain cover making sure the spring side of the seal is directed toward the engine! NOTE: Make sure to lubricate the lips of the seal with grease prior to installing
41Place the metal ring in the second hole in from the crankcase side with the chamfer facing out away from the timing chain cover