When I was at the dealer they were decent assuming you got the 7 . 1 and not the 6 . 0 . Ford has always had a bad habit of going the last thing was bad , this thing is pretty good . We could just improve this thing . or we could roll the dice and make a whole new one , yes let ' s do that . Luckily I mostly just heard about it , the smallest stuff I had to work on were 550 ' s so most of what I saw were running cummins powerplants . The next shop I went to had a service truck f 350 with the 6 . 0 L . In 4 years I pulled that engine and put a rebuild in it . Then I pulled the rebuild and sent it back to the guys that rebuilt it and put another rebuild in it . Then I replaced the EGR valve twice before we deleted it .