What is the normal coolant temp on a 45 degree day just idling in driveway? No AC or heat on. Mine still seems hot running at 215 when my husbands gladiator under same conditions is running at 189 - mine is the 6 cylinder motor. I have a couple other posts because I discovered my coolant overflow - completely dry. Filled it to the max and while its better temps still seem hot. Also have no idea why and where I am losing that much coolant. Going to shop tomorrow.