I have a 2003 150 HPDI. My w/p and thermostats were almost 100$. The mechanic came to my house and changed it. He lives 10 miles from me,and charged me 100$. He even took the time to show me every bolt to remove and where they are located. Next time I will do it myself. Other than locating the bolts there is really nothing to it. You just have to take your time. There are many videos on you-tube to show you how.