I have you all beat. Ford 3.5 liter v66 and eco boost v6. The water pump is internal to the motor behind the front cover. The cam chain runs the impeller. Seal goes bad, like they do, and all of the anti-freeze/coolant goes into the engine. And wala, junk motor. The engine is in around 10 different models. 65,000 to 150,000 miles. No warning. Just a sudden overheating problem. The fix is a used motor and $7,000. Which by the way will eventually have the same problem.
Just to replace the water pump before it fails, $3,000 as the whole front of the motor has to be taken apart.
We had a perfectly good Ford flex which is now going to the junk yard. Car was worth $7k, replace motor $7k. Not worth it.
Ford is silent on the issue.
Ike