Hmm, if you think it's plugged it's not hard to remove. Replace your thermostat as well if it hasn't been done in awhile, don't think that’s the problem but it's a good thing to do, buy a ford one.
1. Drain system at drain cock and loosen burp screw
2. Remove upper radiator hose
3. Remove fan (Two screws and an electrical wire)
4. Disconnect lower radiator hose and inspect
5. Remove intercooler and position upper IC tube out of the way (four nuts)
6. Remove radiator (two screws)
Give it a good flushing
Someone chime in if I forgot something
-B