The Jeep Cherokee Camshaft Bearing's primary function is cradling and allowing the camshaft to spin freely and to time the opening and closing of the engine valves. This regular Camshaft Bearing is positioned in machined Jeep bores with precision and floats on a lubed pressurized oil film preventing metal-to-metal contact and wear. The bearing on different generations of Jeep Cherokee powertrains is built as a cylinder that is pressed into its bore. It must align with internal oil passages, for blockage would starve the Camshaft Bearing and injure the valve train. The usual space between the journal and Camshaft Bearing is one to three and a half thousandths of an inch, which is more than enough to feed oil but not cause vibration. The early Cherokee units were equipped with bi-metal aluminum silicon linings, which help to resist seizure. Knowing this, later Jeep assemblies were furnished with tri-metal layers of steel, copper, and lead tin copper. These new assemblies provided much higher strength and fatigue resistance. The two styles have a similar steel backing; however, a tri-metal Camshaft Bearing will give you superior embeddability to capture dirt that could scar the journal in a working Cherokee engine.
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