How do you adjust the valves on a 1990 Geo storm?

To adjust the valves on a 1990 Geo Storm, first ensure the engine is cool and remove the valve cover. Rotate the crankshaft to align the timing mark on the harmonic balancer with the TDC mark on the timing cover, ensuring the cylinder you’re adjusting is at top dead center on the compression stroke. Use a feeler gauge to measure the clearance between the rocker arms and the valve stems, adjusting the locknut and screw to achieve the specified clearance. Finally, reassemble the valve cover and check for any leaks before starting the engine.