Valve train of an internal combustion engine comprising a tappet and a tappet pushrod

The invention proposes a valve train of an internal combustion engine comprising a tappet and a tappet pushrod that is actuated by said tappet, said tappet pushrod being at least partly hollow and comprising on one end, a first support for an at least indirectly contacting pressure piston of a hydraulic lash adjuster of said tappet that follows a periodic driving element, typically a cam. A second support for a follower member, typically a rocker arm, is arranged on a further end of the tappet pushrod. The first support comprises a passage for hydraulic medium that can be routed out of the pressure piston during operation of the internal combustion engine into an interior of the tappet pushrod, wherein a pipette means is installed in the tappet pushrod for retaining a hydraulic medium column during a standstill of the internal combustion engine. Through the pipette means of the invention, an additional volume of hydraulic medium is available for a rapid filling of the reservoir enclosed by the pressure piston with pressure medium after a re-starting of the internal combustion engine, so that a proper lash adjusting operation is guaranteed from the very beginning.