How do you change the radiator on a Fiat seicento?

To change the radiator on a Fiat Seicento, first ensure the engine is cool and disconnect the battery. Drain the coolant by removing the drain plug or lower radiator hose, then detach the radiator by unscrewing the mounting bolts and disconnecting the hoses and fan. Install the new radiator by reversing the process, ensuring all connections are secure, and refill the coolant before running the engine to check for leaks.