Anybody have a diagram of the coolant system and where the thermostat sits
thanks
koboss

 

Is this what you want?

 

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.

 

here is more for you as well at this link: http://www.backglass.org/duncan/ps64...ing_system.pdf

 

not even close to the same. ya have fun with that job. not a dyi project unless you have a day to do it. it pays about 3 hours to do under warranty.

 

there are 2 t-stats on a 6.4 and I agree the job sucks

 

What's the reasoning behind 2 t -stats?

 

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

 

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.

 

Good info there.