How to adjust the valves on a 1996 Geo Tracker with 16valves?

To adjust the valves on a 1996 Geo Tracker with 16 valves, first ensure the engine is cold and remove the valve cover. Rotate the engine to align the timing marks, and use a feeler gauge to check the clearance between the rocker arm and the valve stem. If adjustments are needed, loosen the lock nut on the rocker arm and turn the adjusting screw to achieve the specified clearance, then tighten the lock nut. Recheck with the feeler gauge and reassemble the valve cover once all adjustments are complete.