2004 Ford F250 Diesel Supplement 2nd Printing - Page 5
2004 Ford F250 Manual
Page 5 highlights
Introduction Engine cooling system The cooling system contains an engine oil cooler which is mounted in the center valley of the engine. The cooler's function is to regulate engine oil temperature. Engine governed speed The engine governor is controlled by the PCM. The PCM controls fuel input to limit maximum engine speed. It will not, however, prevent engine overspeeding resulting from downshifting at high vehicle speed or by descending steep grades at too high a vehicle speed for the selected transmission gear. On F-Super Duty vehicles equipped with a manual transmission, refer to Manual transmission shift speeds in the Driving section of your Owner's Guide for maximum vehicle speed in various gears. Do not exceed 3,600 rpm. Maximum engine governed speed is 4,000 rpm depending on engine load. Excessive rpm can only be achieved by manually downshifting at too high of a vehicle speed. Operating the engine beyond the governed speed can cause severe engine damage. 5