Cylinder head for a multi-cylinder internal combustion engine

A cylinder head for a multi-cylinder internal combustion engine, said cylinder head consisting of a casting with bottom top and side walls defining therebetween a cooling water space and having intake and exhaust passages extending through said cooling water space, columns extending between said bottom and top walls and having bores for receiving cylinder head mounting bolts and well structures also extending between said bottom and top walls for receiving spark plugs or injectors, said bottom wall delineating at its lower side for each cylinder a combustion chamber, and wall structures cast onto the top side of said bottom wall at the circumference of each combustion chamber and extending in transverse and longitudinal directions of the cylinder head between adjacent columns with which said wall structures are integrally formed, at least said transverse wall structure extending upwardly up to, and joining, said top wall, and said intake and exhaust passages passing through said longitudinally extending wall structures and being integrally formed therewith.