weeks before i was climbing out of my property, and coolant spewed out. i took a look, and my surge tank had split 2 small holes in it. ordered a new tank, replaced it, and sure enough miles later my coolant light came on. for a week or two, it seemed as if i was losing coolant and could not find out where. i assumed it was leaking into the motor. i was taking it to a mechanic, and had my wife follow me. as we were climbing out of the property, she saw coolant spewing from under the truck. i imediatly thought it must be a leak at the hoses, and was happy it was not an engine problem. the next few days were trying to see where the leak was coming from, and everytime i got out of the truck to look, it was drying up fast. after changing tank cap, same thing.so, a blown head gasket, or cracked head can cause these symptoms, even with no water in the oil, and the truck runs great?? i was wondering about the water pump also. ive been dealing with this problem for over a month now, the problem is im in costa rica, and good mechanics are hard to find. and here, they will all tell you they can fix anything, but cant even keep theire own cars running. gotta love this 3rd world livin!!