Coolant in secondary filter ISX 2013 485 HP

[Shokar92]

Yeah but I do my oil changes early and add gear oil every time no oil consumption. The rest of the engine looks good. I don’t think I need to rebuild it. I will open the return line to check the injectors for leakage and if I find it I will most likely add 6 rings to all the injectors and try to get a vacuum so I can easily remove injectors like Rawze advised. I checked the secondary diesel filter and it doesn’t have coolant lines going to it and nor do we have diesel tank heater on the truck