I'm thinking of buying an LR4 in fair shape but with a bit of neglect history by the current owner. They driven the car for 9K miles over the past 3 years and never changed the oil. Also the hood liner has traces of pesumably coolant. They're saying the car never overheated. I'm shopping for this car out of state and haven't committed yet to flying out there to check it in person. Otherwise the car is what I want trim and mileage-wise. Question: is the coolant on the liner a sure sign of the engine being bad because of previous overheat, or can this also happen during a minor leak that has not yet became a full coolant loss or an overheat event?