How Do You Drain Antifreeze out of an F-150?

When changing the antifreeze on a Ford F-150, you should use distilled water. The mineral content of tap water or bottled spring water eventually clogs the radiator and heater core as the antifreeze ages. Antifreeze is harmful to the environment, and it is deadly to animals, so be sure to dispose of it properly. You can find the proper mixture of antifreeze and water for your specific F-150 in your owner's manual.

Instructions

1

Slide the drain pan under the radiator petcock. Push the hose onto the petcock's spout. Remove the radiator cap. Open the petcock, using the appropriate open-end wrench. Most F-150s will use a 19 mm wrench.

2

Slide the drain pan under the bottom radiator hose of the radiator. Loosen the hose clamp on the lower radiator hose of the radiator, using the screwdriver or pliers, depending on the type of clamp on the hose. Allow the coolant to drain.

3

Pull the hose off the spigot and tighten the petcock bolt --- it's plastic, so do not overtighten it or it will break.

4

Reattach the lower radiator hose and firmly tighten the hose clamp. Pour the required amount of antifreeze into the radiator. Top off with distilled water. Leave the radiator cap off and start the F-150. Check for leaks while allowing the truck to come up to operating temperature.

5

Top off the coolant when the thermostat opens. Reinstall the radiator cap.