Cylinder head, cylinder head assembly, engine, core for molding cylinder head intake port, and mold for molding the core

摘要

An inner surface of an intake guiding port (25) is configured so as to have a wall section (24) that extends from a terminus (91) on the cylinder side of a spiral-shaped surface (23) to the cylinder side. An end (40) on the opposite side to the cylinder side of the wall section (24) is positioned further on the cylinder side than a cylinder-side opening in an intake-side valve guide boss (27).