Silent Shaft Mechanism The silent shaft mechanism function mainly to eliminate, by the action of the silent shafts incorporated at both sides of the cylinder block, the vertical vibromotive force of the engine as well as the vibromotive moment in the rolling direction, thus making possible quieter operation of the vehicle. The two silent shafts are arranged as shown in the figure below. The right silent shaft rotates in the same direction as the crankshaft, and the left silent shaft rotates in the opposites direction. Both of these silent shafts rotate at speed twice that of the crankshaft. Right silent shaft is driven by timing belt B, and the left silent shaft is driven by drive gear.
G424 Service Manual Engine System 26