My family and I are moving from Louisiana to Florida. We packed up the uhaul and headed out. 10 minutes on the interstate and temp started rising on our 07 cx7 . We shut it down and towed it to a shop. So far they have replaced the water pump, thermostat twice , coolant temp sensor and radiator. Today they just gave me back my money and told me they didnt know. It's still doing the same thing. The overflow reservoir fills up with water and we're guessing the water is spraying out of the overflow. There is no oil in the water or water in the oil....the car has great power and no steam or smoke from exhaust. Please help us !!!