An improved intake manifold valve system for use in a vehicle engine and method of assembly therein. The intake manifold valve system includes a valve housing defining an axis. The valve housing includes a first end and an opposite second end. The first end has an opening formed therein. The opening defines a first axial length. The intake manifold valve system includes a valve shaft assembly disposed in the valve housing. The valve shaft assembly includes a shaft having at least one valve provided thereon. The shaft includes a first end and an opposite second end. The second end has with an extended portion. The extended portion defines a second axial length that is greater than the first axial length of the opening. When the extended portion of the shaft is positioned in the opening, the extended portion is movable axially within the opening. At the same time, the extended portion is operative to operatively support the shaft relative to the valve housing.