i looked under the truck, looking at the water pump and block heater. well the block heater is covered with white chalky stuff, i hope my antifreeze leak is jsut a bad blockheater gasket (if that is possible) hopefully not a cracked block, i couldnt see any cracks but it took me this long to find the white stuff on the block heater. it looks to be coming from the bottom on the block heater and it still looks alittle wet. lets keep our fingers crossed as i dont want to do a headgasket change. i was quoted by 2 cummins shops in a range from 1200-1700 both said it was on the high end but that is the safe end, it can always go down.