Main bearing cap for internal combustion engines

A bearing cap for a main bearing in an internal combustion engine, the cap being composed partially of an aluminum alloy and partially of an iron alloy forming a core in the aluminum material, the core having lateral portions with bores for mounting bolts and a central portion between the lateral portions, the central portion terminating at a distance from a supporting surface for a bearing shell, the supporting surface being the outer limiting surface of an aluminum alloy layer outside the iron core, wherein said iron alloy core having in its central portion at least two channels spaced from each other on each side of the center of the central portion, said channels being filled with an aluminum alloy forming a coherent mass with the aluminum layer.