Ok, I changed my leaking water pump over the weekend. I haven't put any water or antifreeze back in it due to have issues getting the fan nut off. Well, I had a shop take the fan off of the old pump this morning. Tonight, in south Louisiana, it's supposed to get down to 30 degrees. I probably won't have time to get home and install everything tonight. Should I be worried about any little bit of water left in my engine and radiator freezing and messing up something tonight??