ok, white smoke is "water"
and LOL, sorry, define " a little hot" (thecubans son called me awhile back telling me his car was running a "a little hot", uh-from the sound coming thru the cell phone I could tell a rod was about to exit the block, he tells me the oil light has been on "a couple of days" and now, theres "a bunch of white smoke coming out of the hood" gotta love that boy)
unknown if its condensation burning off, or cooling water, or what....
diesels are built with loose(er) tolerences than gas motors, so they are a bit noiser on startup, but it should go away within seconds of firing off. Keep in mind there is a difference in the "sounds" the engine makes. A little clunk-clunk is ok, a sound like a hammer on the side of the block... isn't.
I don't think the engine "seized", did the cap'n try a restart right after it quit? if so, did the engine turn over but just not start, or did it do nothing.
Off hand, I'd say either a fuel supply problem (filter being the first in a long list), or electrical (does the buzzer/overheat have a shut-off/down somewhere in the system)
with fuel being primary cause.
We are not primarily on earth to see through one another, but to see one another through
Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs