One problem related to radiator hose has been reported for the 1997 Subaru Legacy. The most recently reported issues are listed below.
Sudden overheating occurring mostly above 60 km/h symptoms included large pockets of air in cooling system as well as small bubbles. First thought by mechanic was head gasket, however tests on coolant showed otherwise. Small leak found in water pump gasket, replaced entire pump and gasket, as well as thermostat, belts, hoses, etc. Current research has proven that years 1997 through 2002 all do this as a result of a design flaw that causes the head gasket to fail.