Start the engine. Set the heater temperature control dial to maximum heat, then turn off the ignition switch. Make sure the engine and radiator are cool to the touch.

Remove the radiator cap.

Remove the engine undercover.

Loosen the drain plug, and drain the coolant.

After the coolant has drained, tighten the radiator drain plug.

Remove the coolant reservoir, and drain the coolant, then reinstall the coolant reservoir.