Engine cylinder head cooling arrangement

A cylinder head cooling arrangement for an overhead valve internal combustion engine comprising a cylinder head having end faces and a lower surface extending between said end faces and adapted to be sealingly engaged with a cylinder block around a cylinder bore, said cylinder head lower surface having a portion cooperating with the cylinder bore to form a combustion chamber, at least one valve seat on one side of said cylinder head lower surface portion at one end of a gas flow passage formed by an internal wall formed in one side of said cylinder head and defining a gas flow path extending in the area between said end faces and parallel thereto, a water jacket formed in said cylinder head at least in part around said wall and said gas flow passage and said cylinder head lower surface portion, and a coolant flow passage formed in said internal wall and extending transversely to said end faces and said gas flow path passage for coolant flow through said wall.