Lakesrider,
I've used this product for many years with great success. Diesel cylinder heads and engine block cracks, broken castings and all.
It's inexpensive and available at auto parts and good hardware stores.
J-B Weld's tensile Strength: 3960 ( PSI ), and withstands temperatures of 500 degrees, F.
Check it out here;
http://jbweld.net/products/jbweld.php
Just another option.
Terry
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