Abstract: A device for manufacturing an engine block has a casting mold with mold parts and cylinder liners. The mold parts have a seat with seat surfaces for each cylinder liner, and the opposed ends of the cylinder liner are seated in the seat surfaces. The cylinder liners become connected to the material cast in the casting mold and are removed together with the cast material from the mold parts after casting. The seat surfaces are conical and inclined at an incline angle relative to the cross-sectional plane of the cylinder liner seated in the seat such that the opposed ends of the cylinder liner remain seated at the seat surfaces upon heat expansion of the cylinder liner during preparation of the casting mold for casting and during casting.

Abstract: In an engine block having cylinder cavities arranged close together, a cooling duct is produced in an intermediate wall between the cylinders by pouring the casting material around a mold core made preferably from a material that is soluble in a liquid, combustible and/or brittle, so that the mold core can easily be removed from the duct once the casting has solidified. In the casting mold, the duct mold core is secured solely at its ends so that a cooling duct is formed that is bordered exclusively by a skin of casting material.

Abstract: A method of casting an engine block of aluminum whose working surfaces, after milling the interiors of the cylinders, are coated with a harder metal, particularly nickel, includes inserting permanent molds in the sand mold and manufacturing the cylinder interiors of a metal which has a thermal expansion coefficient of greater than 18.times.10.sup.-6 K.sup.-1.