HLA arrangement using cold formed plunger and manufacturing simplifications

A rocker arm, comprising:

• a rocker arm body comprising a force-receiving end, a valve end, and a rocker shaft bore, an extension connecting the rocker shaft bore to the valve end;
• a hydraulic lash adjuster bore in the valve end, comprising:
• a hydraulic lash adjuster body comprising an internal groove;
• a plunger comprising a supply port;
• and
• a circlip or a retainer clip seated in the internal groove and in the supply port.

A hydraulic lash adjuster, comprising:

• a plunger comprising a lash oil supply port;
• a hydraulic lash adjuster body cupping the plunger and comprising an internal groove;
• a lash assembly seated to bias the hydraulic lash adjuster body away from the plunger;
• and
• a retainer clip seated in the internal groove and in the supply port and configured to restrict travel of the hydraulic lash adjuster body relative to the plunger.