Rocker Arm

You can say it a pivoted lever, and it aids to transfer pushrod or cam motion to engine valves. Basically, these are made of aluminum alloys. Often stamped steel is used to make these arms. You may find one of the following rocker arm adjustments on your engine: - Stud Mounted Rocker Arms - Rocker Arms with Adjustable Screws If you look closely, then you will find that rocker arm pivot points are offset from the center. This arrangement aids to gain the rocker arm ratio of 1:5:1. You may also find smaller cam lobe due to this rocker arm ratio. It places high loads on pushrod, cam lobe, and valve lifter.