Sources for Ford cooling system diagrams include Parts.com, ArcherTower.com and FriendlyFordParts.com, as of 2015. These sites have printable diagrams for a variety of Ford models and years.
Parts.com has cooling system diagrams for all Ford models from 1984 to 2015. Archer Tower provides diagrams for various Ford Explorer and Focus models. Friendly Ford Parts features diagrams for each of the parts categories as they relate to the parts that are for sale on the website. However, as with Parts.com and Archer Tower, no purchase is necessary to view, save or print the diagrams.
Other sources for Ford cooling system diagrams include SouthWestFordParts.com and Fordification.com.