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Old 04-02-2013, 10:10 AM   #9
G Ford Fan
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Those were my thoughts from the beginning and I agree 100% with you, however, Ford in all their infinane wisdom decided to put the thermostat in the Duratec UNDER the intake manifold, so you'd have to remove the intake to get to the T-stat housing.

I spliced a T into the heater hose line that runs from the heater core to the T-stat housing (there is a heater hose next to the larger Lower Rad hose on the Tstat housing) I flushed it that way and seemed to get most if not all the old coolant out of the block and heater core that way, but yes, I would have preferred to remove the T-stat and flush that way, but it's just not practical on these Duratec engines, unless the T stat itself has a issue, then you have no choice.
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