Remove it and braze it. I have successfully brazed a couple cast exhaust manifolds, and both held well. But the trick is grinding in a v notch, and getting it hot prior to brazing, and use good flux coated rod. I have a diesel tractor I brazed a few years ago and it was broke clean at the base of the pipe. I ground it off clean, and brazed the pipe to the manifold, and it has been hit by more than one limb and still holding great. If you can find a good used manifold reasonably priced, that would probalby be a better option, but I always enjoy a challenge, especially when it saves a few bucks and nothing to lose by trying. In your case, you will likely know before you reinstall if it works. Trick is to preheat and get it clean and get good flow into the crack. Does not appear to be any stress, so if you can flow it in well, it should work.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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