How do you adjust engine valve clearances of Mitsubishi 4D56 engine?

To adjust the engine valve clearances on a Mitsubishi 4D56 engine, start by ensuring the engine is cold. Remove the valve cover to access the rocker arms, then rotate the crankshaft to bring the piston of the cylinder you are adjusting to the top dead center (TDC) on its compression stroke. Use a feeler gauge to measure the clearance between the rocker arm and the valve stem, and adjust by loosening the lock nut and turning the adjusting screw until the specified clearance is achieved. Repeat for each cylinder, and reassemble the valve cover when finished.