A lifter is a projection that imparts a linear motion to some other component within a mechanism
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A hydraulic valve lifter,a hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters required regular adjusting to maintain a small clearance between the valve and its rocker or cam follower.
A rocker arm lever in an engine, especially one in an internal-combustion engine which serves to...
A tappet is a projection that imparts a linear motion to some other component within a mechanism