A Crankshaft bearing assembly for supporting a crankshaft for rotation about a crankshaft axis within an engine having an aluminum engine block, the crankshaft bearing assembly including at least one crankshaft bearing divided into a first half and a second half, the first half being integral with the engine block, and the second half being a bearing cap connectable to the engine block. The bearing cap is made of an aluminum alloy having a tensile strength higher than the tensile strength of the engine block.