I have a question and I am not even sure if this is the correct forum, but I will ask here. I have a Case 580D backhoe and I believe there is a small hair-line crack on the intake manifold. Is this something that can be "fixed" by a qualified welder, or does it have to be replaced? It is cast, I believe, and there is the heat issue, but is there a way it can be welded so that a complete tear down can be avoided? Thanks for any copmments or suggestions.