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Old May 31st, 2013, 06:15 PM   #7
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You need a nickle rod to weld cast iron. To do it you need to preheat the block to 550 degres and cool it slow. I usually wrap it in a welding blanked and let it be. On the crack v it out good and drill an 1/8" hole at the end of the crack to stop it from spreading. I know this is not what you were looking for being an assembled motor, But it is the proper way to weld cast iron. also be aware, welding can arc between your bearings in the crank and pistons to cylinders ect.
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