Hydraulic tappet (Hydraulic Lash Adjuster) - how does it work? 3d animation. 

The translation itself is fine but the voice is obviously not that of a real person.

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they can be put into the engine empty, but typically can't be primed by using the starter motor, because the cold engine oil is too thich to flow into the tappets. But this is not a problem, simply start the engine normally, let it warm up, and within a few minutes you will hear them quiet down when they are filled with oil.