How do you drain coolant from 2002 lincoln ls 3.9l?

To drain the coolant from a 2002 Lincoln LS with a 3.9L engine, first ensure the engine is cool and then locate the drain petcock at the bottom of the radiator. Place a drain pan underneath the radiator, open the petcock, and allow the coolant to fully drain. You may also need to remove the lower radiator hose for a more complete drain. Always dispose of the old coolant properly and consider flushing the system before adding new coolant.