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Upon taking a closer look at my turbine housing, I found this tiny line, which I believe to be a crack. I doubt it's a gouge, but maybe it is? There also are scratches nearby, and a rather large nick above the suspected crack. Turbine wheel is in excellent condition. What's my plan moving forward?
Interesting! Maybe I’m too worked up about it, but I would like to hear more opinions. It probably doesn’t need pointing out but just in case, these two areas are the ones I’m most concerned about.
Both of those look totally normal. Hit them with a dremel or die grinder if it bugs you. Or heat the area with a torch and see if it spreads. Then you would know for sure if its a crack or just casting. My vote is that its just casting.