Bad Injectors

[RLAM]

I have a very broad question for anyone with more smart's than me, and that could be almost anyone. I have a 6.5TD in a motor home application (97 TREK) and at 18000m miles, seven out of eight injectors went TU. I cannot figure out why they would go bad with such low miles? The filter looks good and it has run good since I have had it, (about 8000 miles) I have taken it to a good diesel dude and it has him scratching his head. Any ideas would help
Thanks

[Kidd]

Only thing I can think of is contaminants.. such as water. :confused:
K.D.

[Beedee]

A good gulp of water can blow the tips off of an injector in the big rigs, don't see why it can't happen to us :confused: