Is there a spring in the hose attached to the thermostat in a 2003 Jeep Liberty?

Yes, the 2003 Jeep Liberty does have a spring in the hose attached to the thermostat. This spring is part of the thermostat assembly and helps regulate the flow of coolant through the engine and radiator, ensuring proper engine temperature management. If you're experiencing issues with the thermostat or cooling system, it's advisable to inspect the entire assembly, including the spring, for proper function.