Coolant Diagram
Hotshot
Joined: Jul 2005
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From: Middle Tn.
Follow the top radiator hose to the engine. That is where the t-stat is. Remove the air cleaner and top radiator hose. Remove 2 ten mm nuts and pry pressure sensor bracket off of studs. It is tight but will move. Remove 2 more ten mm nuts and the t-stat and t-stat housing lifts off of the studs. Use a new O ring when re-installing. about 5 bucks at dealer. This is for a 6.0 but I think they would be the same.
Super Moderator
Joined: Aug 2008
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From: Frederick, MD
here is more for you as well at this link: http://www.backglass.org/duncan/ps64...ing_system.pdf
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
Follow the top radiator hose to the engine. That is where the t-stat is. Remove the air cleaner and top radiator hose. Remove 2 ten mm nuts and pry pressure sensor bracket off of studs. It is tight but will move. Remove 2 more ten mm nuts and the t-stat and t-stat housing lifts off of the studs. Use a new O ring when re-installing. about 5 bucks at dealer. This is for a 6.0 but I think they would be the same.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
What's the reasoning behind 2 t -stats?
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Posting Guru
Joined: Aug 2008
Posts: 1,211
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they are different temps I believe so you get different amounts of flow, I gave up trying to figure out why ford does stuff a long time ago
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Lessons after 9 years
changing the thermostats really is not that difficult of a job. Many try to make it much more complicated than it needs to be. To access it the easiest way possible, remove the driver side battery, the degas bottle with the battery tray and you have nearly direct access to the tstat fasteners. once the clamp plate is loose, turn the top slightly to the front of the engine to pass over the hump in the housing and it comes right off. Then simply pop the housing off, replace the tstats and seals and reassemble. You do not need to loosen or remove the EGR cooler or loosen the radiator and support.... none of that pain in the backside stuff.
Senior User
Joined: Apr 2017
Posts: 343
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From: Houston, TX
changing the thermostats really is not that difficult of a job. Many try to make it much more complicated than it needs to be. To access it the easiest way possible, remove the driver side battery, the degas bottle with the battery tray and you have nearly direct access to the tstat fasteners. once the clamp plate is loose, turn the top slightly to the front of the engine to pass over the hump in the housing and it comes right off. Then simply pop the housing off, replace the tstats and seals and reassemble. You do not need to loosen or remove the EGR cooler or loosen the radiator and support.... none of that pain in the backside stuff.
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