440 overheats once and then it's happy all day

Why don't you start it first thing in the morning, then you're good for the rest of the day...


Ok, if you have air in the system, then warm it up with the radiator cap off. When it gets warm, then add coolant until it is full. Once the engine is warm, the thermostat should be open and you should be able to top it off and get the air out.