I have welded cast many times. I use a wire welder and cold weld it.
If it is just a crack, clean off the oil and paint and maybe v it out a little.
Then cold weld it. What is cold weld? You weld maybe a half inch or so and quit. When it cools you go another half inch or so. Never get it to hot and it won"t expand. Once it expands it"s to late and will crack again as it cools. It may take a day to weld a 6 inch long crack.
I work from both ends of the crack and work towards the middle. Lay the root bead a little at a time "cold welding". Then lay two or 3 more beads by cold welding.
I have welded cast dies for forming car parts, engine blocks and other cast items with this method.
Maybe one failure out of ten. If it fails you grind it out and try again SLOWER.
Use high heat settings on the welder, just don"t weld to much at once.
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Today's Featured Article - Bad Vibes - by Curtis Von Fange. One of the strangest ways to communicate with our tractor is to ask it how it feels. "Ask it how it feels," you say? Yup, ask it how it feels. Now, as with the other articles in this series one has to be able to hear what 'ole blue' is trying to say in response. The nice thing about our old iron friends is that they are usually quite consistent in their response, rather unlike some people I know who might change what they say due to the weather or other mitigating circumstances. But since t
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