Valve actuating device and method of making same

A tool for indenting an inner arm of a rocker arm assembly, the rocker arm assembly including an inner arm, an outer arm, and a pivot axle that pivotally couples the inner arm and the outer arm, wherein the outer arm includes a latch bore for inserting a latch pin for selectively engaging a latch shelf of the inner arm to lock the inner arm and the outer arm together, the tool comprising:

• a press ram comprising a pressing tool;
• a fixture base for holding a first surface of the inner arm of the rocker arm assembly and for holding the outer arm of the rocker arm assembly;
• a pivot axle clamp atop the fixture base for holding the pivot axle of the rocker arm assembly;
• an inner arm clamp for restraining an opposite surface of the inner arm of the rocker arm assembly;
• and
• an indentation pin positioned through the latch bore of the outer arm for bearing against the latch shelf of the inner arm;
• wherein said press ram is configured to actuate the pressing tool to apply an indentation load on the outer arm such that a reaction force transferred from the indentation pin indents the latch shelf of the inner arm.