2011 has 158k fully d*****d I was losing some coolant and blowing smoke out of the exhaust. Mechanic replaced the turbo and said the turbo seals were letting the oil past and burninget out the exhaust. Truck started smoking worse and we could not drive it long enough to determine whether or not the coolant issue was solved. We drained the oil to find it was nearly 4 qts overfilled and pulled injectors, glow plugs and the intake. All looked great on the drivers side but the last 2 cylinders on the passengers side towards the cab the glow plugs and injectors were discolored and oily and sticky. We've pressured tested the primary coolant for 48 hrs at 35psi and all was good. We are at a loss and the only thing I can think of is the either valve seals/guideso or the intake gasket letting coolant by. Any ideas out there or has anyone had any similar issues? Thanks yall.