Paccar mx13 epa13 coolant in fuel!!!

[Nerv]

Hello all,

Just recently purchased two 2016 t660’s with Paccar mx-13 epa13 engines. First one changed the fuel doser and def doser no codes runs great and regen is working now. Second truck was at the shop, i get a message saying there is coolant in the fuel(never noticed this) showing up in the fuel water separator, these trucks are new to me. The fuel in the tanks was very cloudly as well could not see to the bottom. Just drained all the fuel out of the tanks and noticed a small amount of coolant at the bottom. Just put new fuel in, drained the fuel water separator and filled with fresh fuel until i can get new filters. What’s my issues here? Injector cups? Head? Or something else, no other symptoms really, theres no fuel in the coolant reservoir, no low power or misfiring. I know the head is {suspected to be made from compressed graphite iron (CGI) material} and the cups are part of the head, however a company just started making sleeves and the tooling for changing them(which is good). Either way, wanted to throw it out there to see what you guys think?