Just got a 2006 Wrangler with 76,000 miles and an automatic. Previous owner just had the head gasket and radiator replaced at a shop. Temperature gauge points right between 1/2 and 3/4 marks and scan tool shows engine temp 240 to 250 on a short 5 mile drive I just drove it on, but girl I bought it from drove 3 hours here. I can see the head gasket and radiator are new and assume they would put in a new thermostat but who knows. I'm thinking the water pump may not be flowing coolant due to a broken impeller. Is there a good way to check coolant flow before removing the pump? Any suggestions what else to check? Could there be trapped air in the cooling system?