If the gap is too small, work down to the gauge that does fit. That's your cold clearance. Write it down in your service manual before you forget it. Continue with the other valves on this cylinder and then move to the number-two cylinder after you've rotated the crank 180 degrees clockwise. Check, rinse, repeat.For the number-four cylinder, rotate the crank another 360 degrees clockwise and check; for the number three, rotate the crank another 540 degrees clockwise. Don't get confused; all you're doing is ensuring that the cam lobes are facing away from each other on the cylinder you're measuring. It's that simple.