The Rocker Arm used in Jeep Liberty vehicles plays an important role in the valvetrain system of the internal combustion engine thereby enabling the motion of the pushrod to be transferred to the intake as well as the exhaust valves. Usually made of stamped steel or aluminum, Rocker Arm is designed to transform the up-down pushrod action into the amount of pressure that is needful to open the valves. For high RPM applications Aluminum materials are used to reduce the weight of the engine, Cast iron or forged Carbon steel are used on diesel engines as they are strong and durable. Various types of Rocker Arms like roller rockers use needle bearing to minimize friction and abrasive wear and therefore overcome some of the drawbacks of the standard models. The rocker ratio is usually between 1.5:1 and 1.8:1 in the modern engines, this makes it possible to increase the camshaft lift and thus enhancing performance. Newer fulcrum bearings are also installed on the high RPM Jeep Liberty engines in order to address tension and increase longevity and also for proper functioning of the engine.
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