Almost forgot to mention... Ford 6 leakers.....
Stuck VGT turbos
Stuck EGR valves
Cracked EGR heat exchangers.
Injector failure
Head bolts made out of play-doh... alowing head gaskets to blow daily.
Leaking bellows on right side up-pipe.
Easiest way to work on it.... step one... remove cab from frame.
You couldn't get me to buy a 6-Leaker (or 6-Slow?) on a bet. And I am a Ford lover that bleeds blue! Problem is.... I also work on them! I'm dumb.... but I'm not stupid.