Wow
There are plenty of stories around (here) about crap TDs. Its one of those models that have some golden children and some absolute shockers.
I seem to be lucky (now courting the touch of death) and have one of the good ones....only a few problems
. Had the aircon compressor and evap fixed, and the glow plugs cark it all at once - go figure???
But other than that, i love it. The engine have a good reputation, its the Jeep bits stuck to it that cause the probs. My (ex) brother in law said that VM make engines for pumps and things and that they are some of the most reliable engines he's seen...as a fitter/mechanic out in the country.
Apparently the fan clutch is really common prob, but the other stuff u mention hasnt really turned up that much.
Sounds like you come across one of the problem children unfortunately. They a good truck otherwise !!!
Hope this helps.
Ian