I have a 2005 f350 dually I pull a 13000lb trailer and since my truck has had 30000 miles it has been nothing but problems here's the list egr cooler, 2 turbos, radiator, water pump,2 thermostats, fan clutch, cat converter, head gaskets its still blowing off pressure at the radiator cap which has been replaced as well. The overheating seem to have stopped but a surging problem has started and a ford engineer whom is trying to blam anyone but ford is blaming the dealer for not running distilled water... ANYONE!!