I changed the water pump. PW448 is the motorcraft number and it's 104 bucks. The Jaguar one is over 300. Literally the exact same pump made in the exact same factory. Save yourself the money. Also change the thermostat housing unit. Very common problem. I was having my radiator fan stay on after I shut my car off. Figured it was a stuck thermostat. It's never been changed so I just decided to bite the bullet and do it