Mechanical bucket lifter is to ride up and down on the cam and directly open the valves when the cam rotates, making valve mechanism more compact with less components. It consumes small power when the engine rotates due to its simple and light structure, being fuel-efficient and environmental.

Moreover, mechanical bucket lifter has two types of structure, in which the one has a boss in the inner chamber of which the thickness is used to adjust the valve lash and 0.05mm is the grade of the boss, different boss heights are chosen to adjust various valve lash; another is composed of base and shim, shims with different specification are used to adjust the valve lash and there’s chute at the top of the base with convenient dismounting of shims, making low maintenance cost of engine.