Well, not really a full-on disaster, but it would have been a huge inconvenience.
Pulled the 5th wheel to a campground about 130 miles from home. Fully loaded I was 21000 lb combined weight and there were several mountains in central PA that were sustained pulls of 2800 rpm, 25 psi boost.
When I arrived at the campsite we set up I I took a peek under the hood. There was oil spray on the underside of the hood. Not a huge oil stream or anything, but you could tell that it had been spraying or misting for some time. Enough that when I lifted the hood, it ran downhill into a drop or two. I looked at the turbo boot and there was a crack lengthwise from turbo to cac tube. It wasn't blown wide open, but I was concerned about making those pulls on the way home.
I ran by the local hardware and picked up some Gorilla Tape. Wiped the turbo boot clean with some kitchen degreaser, then with water, then dried it. I got three pieces of Gorilla tape wrapped around it; each went around about 1-1/2 times.
Started off a little timid & tried to keep the boost down, but there's just no way. Pulled home just fine. Back up the same mountains running sustained 25psi the whole way
Ordered up some new Riff Raff boots & clamps a few minutes ago. The duct tape held nicely, but definitely took a beating from the heat. Would the boot have come apart on my way home? Who knows. I figured the little extra insurance was worth it
On a related note, this is my first pull after semi-bulletproofing over the winter and my first pull in semi-hot weather. Over Christmas I did a new oil cooler, BP EGR cooler, HPOP STC fix. I never heard my big fan come on before today, but pulling the grades, at 218°ECT it would ramp up & get everything back under control nicely. ECT/EOT stayed nicely about 8° apart. There's always those moment when cresting mountains or other odd transitions that temps go further, but on average in the mountains and the highways, I'd call it an 8° split. I'm quite happy with that.
All in all, it was a very successful first trip of the year. With my new boots installed, that will be one less thing to concern myself with next time