With all the threads on coolant flushing, concerns, questions, how do I's I put together a document which I hope helps. In it it contains a description of the cooling system, and an excellent complete flush which can be performed to provide the best possible results. I hope you like it and comments are welcome!
http://www.powerstroke.org/forum/attachments/general-6-0l-discussion/498658d1452373950-how-2006-high-idle-mod-w-switch-cooling_system_flush_v1-0.pdf[/B]
http://www.powerstroke.org/forum/attachments/general-6-0l-discussion/498658d1452373950-how-2006-high-idle-mod-w-switch-cooling_system_flush_v1-0.pdf[/B]