Not trying to hijack this thread (guess I am really).
Dogg, when you say the 6.4 has oiling, fuel and water issues. Do you know of a way to fix these issues? Is there a certain company making parts to correct these issues??
Here is my take on the 6.4, which means absolutely nothing. The trucks that they put these in simply don't have the real estate to keep them cool. They need bigger radiators and intercooler and more air flow over them.
My plan is to put a better radiator, Intercooler and a cowl hood on mine after rebuilding it. Keep an eye on egt's, change the oil religiously and don't idle the truck extended amount of time.
Please save me the headache of doing this if it is just a waste of time. I know the general consensus is these engines are junk. I think if the same amount of effort was put into these as the 6.0 it would be superior to the 6.0. Again, I am far from a diesel mechanic. I am just stating my opinion here based on research I have done on the 6.4. Please correct me if I am way off base.
Your looking at future nightmare.
A better radiator isn't going to solve the issues these engines have. The fuel system was done by Siemens, I never even knew Siemens did fuel systems, it's a POS. If it's not Bosch it's not a fuel system.
The 6.4 is based off the 6.0, the injectors on the 6.0 work on high pressure oil pressure, has the oil exhausts from the injectors and sprays the valve train. The 6.4 injectors don't work off oil pressure so now the valve train doesn't get much oil and that's why they have problems.
The 6.4 is a POS, expensive to fix, will continue to need repair after it's fixed. It's basically a grenade with the pin out.
Your better off stepping up to a 6.7 truck, this engine is light years ahead of the 6.4
There's better ways to be miserable in life than owning a 6.4