MANUFACTURING METHOD FOR CAMSHAFT SUPPORT STRUCTURE OF INTERNAL COMBUSTION ENGINE, AND CAMSHAFT SUPPORT STRUCTURE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To sufficiently secure the processing accuracy of a bearing hole of a camshaft while reducing a time or a cost spent in the bearing hole processing of a bearing of the camshaft, in a manufacturing method for the camshaft support structure of an internal combustion engine and the camshaft support structure of an internal combustion engine. SOLUTION: An upper cam carrier integrated head cover 34 is integrally provided with a plurality of upper bearings supporting an intake camshaft and an exhaust camshaft. In a state that a #1 lower bearing member 42 is combined with a #1 upper bearing 40 and in a state that two upper cam carrier integrated head covers 34 are combined with each other so that their longitudinal directions are opposite to each other, the bearing hole processing of each of the upper bearing parts 40 and a #1 lower bearing 44 is performed from one end side of the head cover 34. COPYRIGHT: (C)2007,JPO&INPIT