Hello,\n\nI have a 2008 Subaru Outback that has been having slight engine problems. You can smell the radiator from the car when at highway speeds (60-80 mph), the radiator fluid reivoir is also full, but no fluid is actually getting to the radiator. A puddle forms under the car in the area where the line connects to the radiator but it does not have a green color to it. It looks like there may a nut that needs to be retightened which might be the fix, but I want to make sure that it shouldn't be anything worse. Could it be the head gasket that leads to the engine?