I would like some information on welding a cast iron manifold on a boat. There is a 1 inch long crack, on the Y pipe of a mercruiser and is a cast iron metal. I would assuming drilling a small hole at each end and placing a small V in the crack, I could weld mig weld the crack, and peen it afterward. Is this the correct method, and how well will this hold up. The material is only about 1/8" to 3/16" thick. If peening the material afterward, I would assume I will not be able to hit it very hard. I am hoping to weld this, as the part is not very expensive to replace, just alot of work involved in removing it. I am able to weld the brocken piece without any problem.
Thanks for any help in advance.