Engine valve lifter having anti-rotation plug

An engine roller lifter for use in a valvetrain of an internal combustion engine, the engine roller lifter comprising:

• a body having an outer peripheral surface configured for sliding movement in a bore provided in the internal combustion engine, the bore supplied oil by an oil passage communicating therewith, the body defining an opening and a relief;
• a roller bearing rotatably mounted to the body and configured for rolling contact with an engine camshaft;
• and
• an anti-rotation plug received at the opening, the anti-rotation plug having a cylindrical plug body including an anti-rotation protrusion that extends from a face surface of the cylindrical plug body, the anti-rotation plug extending radially beyond an outer peripheral surface of the cylindrical plug body in an installed position, wherein the anti-rotation plug is staked into the opening of the body such that material from the body that is displaced during the staking is accommodated at the relief, wherein outer radial surfaces of the cylindrical plug body expand radially outwardly at diametrically opposed positions subsequent to, and as a result of, the staking causing the cylindrical plug body to attain an interference fit between the cylindrical plug body and an inner diameter of the opening.