Just check blowby first, if good check the turbo. As the first 2 basics.
dump it to me for the right price
I have a lower miles RGT 6.7 from an '08 Freightbreaker you could probably swap in.
You'd have to use the 5.9's injectors and externals, though.
If it's a black painted engine, the injectors should work.
Otherwise, it'll scale out for ~ $1200, or so, in weight. :hehe:
Mark.