There is a hose that runs behind the engine that had a leak and wasn’t able to figure out why the car ran out coolant. At the 20 year mark nearly all rubber pipe on this car were brittle if you touch them they would break. I had to replace radiator, thermostat, bunch of hoses to finally find out that there is a hose behind the engine. I spent a lot of months fixing this car and just in parts I spent 500 on that problem.