Can u block the hose running from the intake.

Is that the nipple for the intake manifold that returns the coolant back top the coolant reservoir?If so no so did the nipple break on the manifold the one by the egr tube?If so you can replace the intake manifold or they sell a metal repair nipple. Where you remove the manifold and cut the port/nipple off the intake manifold to install the metal one. If you want to make the repair let me know and i. Will help you find one I would repair it if it was used mine.