Skip Burney
Member
Well now that I have a good block to work with I was thinking today about my old cracked block. Obviously you cant weld it you would end up chasing the cracks all over the place, brazing them might be an option but still the cracks might run. So I was thinking has anyone ever tried to sandblast the bore to clean white metal, you cant get it clean enough with a wire brush no matter how hard you try. So sandblast the bore to white metal, tin it up good with tinning compound and seal the cracks with lead. You can use a propane torch to work it in and that has a really soft heat. Lead is so soft you could probably work it down by hand without reboring the cylinder. All you are doing is sealing the crack and there will be a liner on one side and water on the other, the lead will never get hot enough to melt and should be just as stable as the cast iron. Just my mind running while sitting in traffic today. I am sandblasting the fenders and running boards and stuff this weekend I might give it a try. Anyone ever done it?