Cylinder block and crankcase for a liquid-cooled internal-combustion engine

A cylinder block and crankcase for a liquid-cooled internal-combustion engine, comprising:

• a power unit block made of an aluminum alloy and including,
• a crankshaft side and a cylinder head side,
• a deck on the crankshaft side,
• bearing blocks molded to the deck,
• cylinders arranged in one piece above the deck,
• enveloping walls,
• cylinder head side coolant spaces surrounded by the enveloping walls,
• channels for fastening the cylinder head, which are placed in the enveloping walls,
• webs arranged on the cylinders, wherein the channels are connected to the deck by the webs, and
• openings and fillable ducts;
• and
• a case constructed of a magnesium alloy and cast around the aluminum power unit block, the case including
• transverse connections
• case wall sections surrounding a crank space, the case wall sections being connected with one another with the transverse connections with the bearing blocks,
• oil ducts,
• a first end area and a second end area,
• a face-side duct stiffening the first end area,
• threaded eyes disposed in the second end area and arranged at the aluminum power unit block,
• ribs supporting the threaded eyes for the releasable connection of a clutch housing or transmission housing, and
• wherein the case is additionally connected with the aluminum power unit block by penetrating the openings and fillable ducts of the aluminum power unit block with the magnesium alloy of the case.