Engine block

Machine housing (1) in Al alloy with an Mg alloy surface and at least one outer structure (2), especially a crankcase or drive housing for an internal combustion engine, where all structures (2) at the assembly point of the machine housing (1) going out from a geodetically highest point relative to a high axis (A) are sloping in at least one region (3). Region (3) is a bore at least in part.