Hi i am new to diesels, i think i have a cracked head in my zd30. water is bubbling up out of the radiator when engine running, some air bubbles as well.
Howdy,,, could be! Any cream where the oil should be? Not a true sign but if there is water/coolant in the oil you should see it. You might notice an oil film on the water/coolant also.. Shame if it is- keep 'Us" posted ok ..