I wonder if this is cast grey iron or the better cast ductile iron?
Time to make the call to find out I guess
Both have their advantages,
Gray dampens vibrations better, machines better, cheaper to manufacture , better thermal conductivity,(transferring combustion heat to water jacket) oddly , its stiffer then ductile, which also means it's brittle compared to Ductile.
Ductile ...has a greater tensile strength, impact and fatigue resistance
High end cylinder sleeves are made from Ductile, while stock or lower end sleeves are gray ... "dry sleeves" are almost always made from gray, a lot of your "wet" sleeves are made from ductile.
The G3 blocks have one of the higher nickel contents in the OEM engine blocks, highest of any Chrysler block made,.
