To adjust the valves on a B16 engine, first, ensure the engine is cold and remove the valve cover. Then, rotate the engine to top dead center (TDC) for the cylinder you are adjusting, checking the gap between the rocker arm and the valve stem with a feeler gauge. The specified clearance is typically around 0.005 inches for intake and 0.007 inches for exhaust valves; adjust using a 10mm wrench to loosen the lock nut and turn the adjustment screw as needed. Finally, recheck the clearance and reassemble the valve cover.
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