In a block mounted camshaft engine, which component connects the roller type cam follower to the rocker lever?

In a block mounted camshaft engine, the push tube serves as the crucial component that connects the roller type cam follower to the rocker lever. The function of the push tube is to transmit the motion from the cam follower, which follows the contour of the cam lobe, to the rocker lever. This mechanical linkage is essential for the opening and closing of the engine’s valves, allowing for proper intake and exhaust stroke management.

When the camshaft rotates, the roller type cam follower rides over the cam profile, creating a linear motion that is then transmitted through the push tube. As the push tube moves, it activates the rocker lever, which pivots and ultimately moves the valve stem. This pathway of motion is vital for maintaining the timing and efficiency of the engine's operation.

The other components, while important in their own rights, do not play the direct linking role that the push tube does. Valve guides help maintain the position of the valve stems within the cylinder head, valve springs provide the necessary force to close the valve after it has been opened, and the camshaft itself is the source of the cam profiles but does not serve as a connection between the cam follower and rocker lever.