I had the same "common issue" with 2013 around 75k and 85k. Coolant leak was in two different places. Like the first fix pushed it in down the line.Major coolant leak right now. Apparently it’s a thing with that year/model.
I second this.the second gen 2.7 is their best engine but i can;t tell if you tow a lot and that's why it's out of the equation?
This is your absolute best advice! My family has had a Ford dealership since 1978. I’ve kept my eye on Ford’s quality and longevity first had for many years. You can argue all you want with @metroplex but he’s correct. I drive a 2011 F350 6.2L for the simple fact of all the other motors have too many design flaws that Ford will not fix.If you want a KISS reliable engine from Ford? The 7.3 Godzilla or 6.2L are your only choices.
The Coyote Tick is an issue that Ford has yet to fix.
The 3.5L EcoBoost has had cam phaser issues on the trucks forever and STILL have not been fixed by Ford on the latest trucks, and it includes the Raptor's. The 3.5 runs this super long timing chain as well, so you need to keep up on your oil changes to prevent the soot from wearing down the chain rollers. 5000 mile intervals are recommended, whether it is synthetic 5W-30 or pixie dust uber handcrafted artisanal multi-level marketed oil.
Your Transit's 3.5L EcoBoost is going to be different from the 2018-up F-150 Gen 2 3.5L EcoBoost.The Gen 2 has split injection (port and direct) so the intake valves get washed. The Gen 2 for 2018-up also run the same HO turbos as the Raptor. The only differences are the turbine wheels on the Raptor HO are made of a different material to handle high temperature desert racing schedules and the HO has slightly reduced compression ratio for the same requirement. Otherwise the Gen 2 3.5's for 2018-up have the same turbo compressor maps (HO or Non-HO) so with a tune you can get the non-HO to run about the same or more power than the HO. The Raptor and non-HO engines are torque limited by Ford with the programming for the advertised ratings.
But again if you want a reliable truck engine, the 6.2 or 7.3 Godzilla are really your only choices. I know people are going to fight me on this chiming in with their 2 cents on their experience with their personal EcoBoost engines or Coyote Engines, but there are several known issues that Ford has yet to fix on these engines since their debut. Hard pass from me.