Abstract: A method of manufacturing a lash adjuster body for use in a lash adjuster assembly can include forming a lash adjuster body to an as-formed condition including an outer cylindrical surface, an inner cylindrical surface leading to a blind bore, an end surface and a leak down portion. The method can also include imparting a wear resistant surface layer to at least the leak down portion of the inner cylindrical surface using ferritic nitrocarburizing (FNC). The lash adjuster body is upset at the end surface thereby forming at least one overlap portion that overlaps an opening to the blind bore.

Abstract: A method of manufacturing a lash adjuster body for use in a lash adjuster assembly can include forming a lash adjuster body to an as-formed condition including an outer cylindrical surface, an inner cylindrical surface leading to a blind bore, an end surface and a leak down portion. The method can also include imparting a wear resistant surface layer to at least the leak down portion of the inner cylindrical surface using ferritic nitrocarburizing (FNC). The lash adjuster body is upset at the end surface thereby forming at least one overlap portion that overlaps an opening to the blind bore.

Abstract: A method of manufacturing a lash adjuster body for use in a lash adjuster assembly can include forming a lash adjuster body to an as-formed condition including an outer cylindrical surface and an inner cylindrical surface. The inner cylindrical surface can have a leak down portion and a blind bore. The method can also include imparting a wear resistant surface layer to at least the leak down portion of the inner cylindrical surface with a sub-critical temperature process. The method can also include preserving the leak down portion in the as-formed condition during imparting of the wear resistant surface layer.

Abstract: A method of manufacturing a lash adjuster body for use in a lash adjuster assembly can include forming a lash adjuster body to an as-formed condition including an outer cylindrical surface and an inner cylindrical surface. The inner cylindrical surface can have a leak down portion and a blind bore. The method can also include imparting a wear resistant surface layer to at least the leak down portion of the inner cylindrical surface with a sub-critical temperature process. The method can also include preserving the leak down portion in the as-formed condition during imparting of the wear resistant surface layer.

Abstract: A tappet having a contiguous body, an outer wall and transverse web. The outer wall defines a cylindrically-shaped outer surface and a recess. The recess is disposed within cylindrical surface of the body. An alignment member is press-fit between two staked ends of the recess, which engage opposite sides of the alignment member. The alignment member extends outwardly from the cylindrically-shaped surface. A roller is mounted to the contiguous body at the cam contacting end of the tappet.

Abstract: A tappet having a contiguous body, an outer wall and transverse web. The outer wall defines a cylindrically-shaped outer surface and a recess. The recess is disposed within cylindrical surface of the body. An alignment member is press-fit between two staked ends of the recess, which engage opposite sides of the alignment member. The alignment member extends outwardly from the cylindrically-shaped surface. A roller is mounted to the contiguous body at the cam contacting end of the tappet.