In Ford Ranger vehicles, the Rocker Arm plays an important role for the engine's valvetrain by allowing motion transfer between the pushrod and the intake/exhaust valves. Usually made out of stamped steel or aluminum the Rocker Arm links the movement of the valves to that of the pushrod, in that it translates a vertical pushrod motion into the required downward force to open the valves. In engines with high rpm, aluminum is used because of its low density while cast iron or forged carbon steel is used in applications involving diesel engine because of its strength. Different types of Rocker Arms types have been used in the Ford Ranger models, these include the standard and the Lokar roller rockers. As for the roller rockers which possess not only the overhead valve but also the overhead camshaft, there are some main advantages namely the needle bearings to minimize the friction. The rocker ratio developed from 1.5:1 to 1.8:1 in any modern engine is useful to increase the capacity of the lift made by the camshaft. Similarly, bodies crankshaft fulcrum bearing are also enhanced for stresses and reels of Ford Ranger engines for high RPM workloads.
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