Engine cold, remove both spark plugs & valve covers, gently insert long dull screwdriver or plastic straw in spark plug hole, both hands on engine screen, rotate engine clockwise from top until piston is at top or TDC, both rocker arms should be loose if you're on correct stroke, if not, rotate with both hands on top of engine screen until piston is at top TDC again and both rocker arms are loose, valves closed, now you're ready to check & adjust both valves, intake & exhaust, this procedure works for both sides. It may be easier if you have a helper. I would set them at 0.005 with feeler gauge, if adjusted correctly you will feel a slight drag on feeler gauge when inserting gauge between rocker arm & valve stem end. Your local auto parts store should have feeler gauges, just make your feeler gauge size is in pack.