How do you flush radiator on 1998 mercury grand marquis?

To flush the radiator on a 1998 Mercury Grand Marquis, start by ensuring the engine is cool, then remove the radiator cap. Place a drain pan under the radiator and open the drain valve or remove the lower radiator hose to drain the old coolant. Once drained, close the drain valve or reattach the hose, fill the radiator with a flushing solution mixed with water, run the engine for 10-15 minutes, and then drain again. Finally, rinse with clean water, refill with fresh coolant, and check for leaks.