I had to replace the thermostat housing and it was a huge pain in the butt and a stupid design who makes something like that out of plastic? It costed $80 because I replaced it myself. Shops want $500 or more.

Thermostat housing cracked open while on the Highway. Car over heated. I needed to be towed to my destination. I bought the parts myself and changed the upper and lower thermostat housing along with a new thermostat and o ring. spent $175.00 to have a flat bed tow me. Parts were about $75 from a local parts dealer not FORD. Saved money on labor by doing the job myself. I then needed to get the entire coolant system flushed and filled with new coolant that cost about $125.00 for a shop to do it.

I can't believe Ford would even think of using a plastic intake. What's next plastic pistons? When you have to remove the sensors from the thermostat housing be prepared to buy new ones. They made the housing ford proof. The back yard mechanic can't take the sensors out with out damaging the O rings.