The Rocker Arm used in Jeep Cherokee cars provides a critical part for the engine's valvetrain system and helps to transfer motion from the pushrod to the intake as well as the exhaust valves. Said to be made of stamped steel or aluminium, the Rocker Arm then maintains the required motion of the pushrod down, to open up the valves. For high-RPM operations we have aluminium for its light weight but for durability, such as in a diesel engine we have cast iron or forged carbon steel. Types of Rocker Arms used in Jeep Cherokee models at different period of time include traditional and roller type. Roller rockers using needle bearings have an advantage on overhead valve as well as overhead camshaft engines. The rocker ratio of modern engines vary between 1.5:1 to 1.8:1, this increases the lift of the camshaft and thus offering better performance. Newer fulcrum bearings are also installed on high RPM engines to deal with loads and the overall toughness of the Rocker Arm system of Jeep Cherokee vehicles.
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