ISX450 coolant issues

[Lonestar10]

Could also be bad EGR cooler check that undoing the exhaust out side of it set a Tupperware bowl under it pressurize cooling system to 20psi and let sit overnight. Could also go on step further and drain oil and remove oil pan and that next morning bar engine over while looking for water coming out from under the liners.

If you keep oil clean and put it back in all this work only costs an oil pan gasket and maybe a beer or two for your assistant