I did a bit of research on welding cast iron. Appears that a NI (nickel) rod is the best way to go. Since it is difficult to pre-heat the whole block, there are ways to use the NI rod to do this.
I am wondering how long the engine ran this way with no issues......from the bottom of the head gasket, it appears to have been this way awhile, as it is "stained" where the crack is, and still no indications of coolant leakage, as there was zero staining on the block surface on either side of the crack. Also considering, the thermo-siphon system is low to no pressure in the cooling system.
Since these are low-compression engines, it may not be an issue to run "as is". This block will be used to restore a B, and it is going to be a "show queen", so it won't get worked hard........
I am going to explore welding it with one of the local welding companies.....
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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