Our DP exhaust muffler started leaking @ about 85K mi and Rocky Mountain cummins in Denver started to fix it and the following took place: Had to replace the engine head because couldn't get the bolt out and it did not pressure test to specs, replaced high pressure fuel pump and all fuel lines, replaced turbo charger, replaced exhaust muffler, cost 12,700 when all said and done. The other major repairs over the years were replaced radiator. hydraulic motor and fan, repaired radiator after rock put a hole in it, replaced all heater hoses including front to back, replaced A/C compressor, dryer, replaced front elect. distribution panel board.
I can't tell you all the $$$$$ spent to keep this thing running. We now have 105K mi and hope it keeps running for our summer trips this year. We still love the Dutch Star & Can't bring ourselves to selling it because we love RVing vs Moteling.