Can a turbo on a 6.9 chevy diesel leak oil into the air intake?

Would this make the rig smoke? Is there a seal or something in the turbo?Can a turbo on a 6.9 chevy diesel leak oil into the air intake?
check the turbo


it has a oil passage in it to lube the bearing


if the seal goes bad it can leak oil in the intake


or even worse start to run on the oil and the engine rev out of control (';engine over speed'; or 'run away'; are common terms to describe this condition)


also check the crank case breather , i believe the return goes onto the intake as well


this will be a tube form one of the valve covers to the intake if your model has it

lending