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Joe- Like Mike sez, pay attention to whatever Tbone sez... Short of that, grind a vee groove all the way in every crack. Make a big effort to determine where the crack ends and drill a small hole in the end of the crack, to make sure it don't spread past that spot. After that, get you some nickle electrode, practice on some scrap cast iron, and then practice some more. Keep in mind that old Henry used some spl. mixes in his foundry, and welding & brazing them can cause some head scratching. Anyway, weld one inch and quit. Grab the chipping hammer and peen the daylights out of what you just welded. Then, leave the thing alone 'till the next evening. Then, do it again. The trick is to not build up a bunch of heat stress in the casting. If you're impatient put the casting in the oven as high as it'll go, or your wife will allow, and fater 8 hours blaze away with the NI rod. I'm sure there are newer and better products on the market now. Suggest try for commo with Steve at US Alloys and not get bogged down in advise from an old fool. I once did this on a "Model C" engine, 1933 truck engine, full pressure oil, counterbalanced crank, wild cam, and lots of good memories in a Model A coupe. Good luck and try for commo with Steve on the tools page. IHank
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