Cooling System Bleeding: Draining

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Less than 80% of coolant capacity can be recovered with the engine in the vehicle. If coolant is dirty, rusty, or contaminated, it must be replaced.

Release the pressure in the cooling system. Make sure the engine is cool. Wrap a thick cloth around the coolant pressure relief cap on the coolant reservoir. Slowly turn the cap counterclockwise (left) until the pressure begins to release. Step back while the pressure releases. When you are sure all the pressure has been released, use the cloth to turn and remove the cap.
Place a suitable container below the radiator draincock. If equipped, disconnect the coolant return hose at the oil cooler.
Open the radiator draincock. Remove the cylinder drain plug, if equipped, and drain the coolant from the cylinder block into a suitable container.
When the coolant is drained, make sure drain plugs are installed and tight.
Close the radiator draincock when finished.