Abstract: For a process for fracture separating the bearing cover of a multi-part bearing arrangement, particularly in crankcases of internal-combustion engines, by means of a half-mandrel in a bearing bore partially bounded by the bearing cover, for separating integrally constructed fastening flanges of the bearing cover from the remaining part of the bearing arrangement, it is suggested for producing fracture separating surfaces in planes sloping with respect to one another that the pairs of corresponding fracture separating surfaces of the bearing cover and the remaining part of the bearing arrangement are produced in separating areas which together enclose an obtuse angle (.alpha.) having a case-side vertex by at least one half-mandrel whose curvature radius, as a function of the respective obtuse angle (.alpha.), is selected to be by 0.5% to 5% smaller than the constant radius of the bore receiving the half-mandrel.

Abstract: An internal combustion engine has an engine unit support, comprising such und-carrying parts as cylinders, cylinder head, pistons, piston rods, crankshaft bearings, and crankshaft, which is provided, at least at the output end thereof with a bracket of at least two arms which bracket is attached to the crankshaft bearing seats and is provided with at least one sound-insulating element on each end. At least some of the sound-insulating elements carry inner sleeves acting as setting elements whose axial position relative to outer sleeves thereof may be adjusted even after the engine unit support has been mounted in the crankcase. In this simple manner the sound-insulating elements may be provided with any desired pre-stressing, which will help to achieve optimum sound-insulation.