2013 ISX 15

[Nerv]

Hello All,

Got a 2013 ISX 15 in my Kenworth t800, recently noticed small amounts of coolant coming out of the blow by tube. Told mechanics to drop pan and pressure test, instead they blocked the blowby tube and now the oil dip stick is measuring higher, basically saying that coolant is going into the oil, liner dropped or cylinder head issues.. noticed some black sludge ontop of oil fill cap, but thats about it.. truck used small amounts of coolant but there was external leaks at that time.. I dont want to jump to conclusions, any recommendations? 20psi overnight with the pan dropped should show me where its coming from?