Abstract: A cylinder block for an internal-combustion engine includes a cast gray iron base block having, as integral, one-piece components therewith, a cylinder sleeve, a crankshaft bearing bracket and an engine foot. The cylinder block further has an aluminum shell surrounding the base block and having a portion constituting a water jacket in a shell zone adjoining the cylinder sleeve.

Abstract: A core box for producing casting cores having a core defining member made of a first material and defining a core molding cavity. A stream of molding substance is introduced into the core molding cavity when a core is molded. A core marker is made of a second material and is located in the core member in fluid communication with the cavity. The second material is more wear-resistant than the first material, being a non-deformable hard metal. The core marker is a shaped insert for defining a predetermined configuration of a casting core when a molding substance is introduced into the core molding cavity. The shaped insert is located at a position within the core molding cavity at which position high velocity flow or changing velocity flow of a stream of molding substance is intercepted.

Abstract: In a method of producing cores for foundry purposes, with the cores being composed of at least two core sections and being firmly joined with one another, the individual core sections are molded separately in a core mold composed of at least two mold sections. At the end of a molding process for the individual mold sections, their core mold is opened in such a manner that the core section remains connected with a mold section. Then the individual core sections to be joined, together with their mold sections, are moved into an assembly position and are joined together by defined relative movements of the mold sections with respect to one another. After the joining process, the one mold section is released first and then the assembled core is ejected from the other mold section.