318 motor valves may have different measures that indicate the overmedy of the valve, that is, the increase in the diameter of the valve head to compensate for valve seat wear. To know the measurement of the valves of your engine, you must measure the diameter of the valve head with a caliber and compare it with the original diameter. For example, if the original diameter of the intake valve is 48,665 mm and the measured diameter is 48,815 mm, the valve measurement is +15