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Old 11-16-2009, 12:03 PM   #5
modelageek's Avatar
Join Date: Jan 2009
Location: Boston, MA
Posts: 2,213
Vehicle Year: 2004
Vehicle Make: Ford
Vehicle Model: Ext Cab, 4WD, Auto, 4WABS, AC, 140k/90k.
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modelageek will become famous soon enough

I think you want this motorcraft F8CZ-8575-AA and you should get a new oring gasket for the housing. I am not trying to ruin your fieldtrip but there are other things that could be causing your issue but a new tstat is never a bad idea. Also you should be able to tell if the tstat is open by feeling the upper rad hose
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