Consensus on the internet seems to be between 300-450F(or so) to shutdown. Everywhere I drive I am always right around that since it takes a bit to park, etc.
Basically, dont pull a full load, come to a stop and immediately turn engine off. I doubt many of us do that. Mine cools down really fast.
Technology and mechanics have come a long way, we really do not have much to worry about with these trucks. Just take it easy a bit before shutdown.
FYI The chart is from a 2014 RAM Diesel.
2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled
Last edited by wreedsvt; 05-09-2019 at 10:48 PM.