The valve train of an internal combustion engine is a complex system where many parts must work in perfect harmony. Two of the most important components in this mechanism are rocker arms and tappets (lifters). They transfer the camshaft’s rotational motion into linear motion to open and close the engine’s valves. When either part begins … Read more
In internal-combustion engines, especially pushrod (OHV) engines, tappets — also called valve lifters — play a critical role: they translate the motion of the camshaft into motion that opens or closes the engine’s valves. But not all tappets are built the same. Broadly speaking, there are two major categories: hydraulic tappets and solid (mechanical) tappets. … Read more
Modern internal-combustion engines are full of moving parts — pistons, camshafts, valves — and among the unsung heroes of the valve train are the humble tappets and rocker arms. Although small, these components play a critical role in translating the camshaft’s motion into the opening and closing of the intake and exhaust valves. In this … Read more