How do you adjust valves on 1982 Datsun 280zx which way do you turn the lock nut?

To adjust the valves on a 1982 Datsun 280ZX, first loosen the lock nut by turning it counterclockwise. Then, use a feeler gauge to measure the gap and adjust the valve by turning the adjusting screw clockwise to decrease the gap or counterclockwise to increase it. Once the desired clearance is achieved, tighten the lock nut while holding the adjusting screw in place to maintain the setting. Always double-check the clearance after tightening to ensure it remains correct.