Cylinder block for automotive internal combustion engine

A cylinder block for an automotive in-line multiple-cylinder internal combustion engine, comprising:

• outer wall means including oppositely located first and second end wall sections, and oppositely located first and second side wall sections, the top surface of said wall sections being continuous and lying on a common plane;
• an elongate cylinder row structure spacedly located within said outer wall means, said cylinder row structure including a plurality of cylinder sections whose neighbouring cylinder sections are integrally connected with each other, said cylinder sections containing first and second extreme cylinder sections located at the opposite extremities of said cylinder row structure and positioned in the vicinity of said first and second end wall sections of said outer wall means, each cylinder section being formed with a cylinder bore therein, the top surface of said cylinder row structure lying on said common plane;
• and
• first and second connecting wall means located between said outer wall means and said cylinder row structure, said first connecting wall means integrally connecting said first extreme cylinder section with said first end wall section, said second connecting wall means integrally connecting said second extreme cylinder section with said second end wall section of said outer wall means, thereby forming first and second coolant passages which are separate and independent from each other, each coolant passage being defined between said side wall section and said cylinder row structure, the top surface of each connecting wall means lying on said common plane.