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Engine bearings should always be replaced when you are rebuilding an engine. Consequently, Heat, pressure, chemical attack, abrasion and loss of lubrication; can all contribute to deterioration of the engine bearings. So, All bearings will show some degree of wear. But, A close examination of the old bearings may reveal other problems.
The main bearings are located in the engine block. The main bearing sits inside the main bearing housings that hold the crankshaft. One bearing is located in the engine block and the other in the main cap. Main bearings may have certain characteristics such as oil holes, locating tags and oil grooves.
So, Connecting rod bearings provide rotating motion; of the crank pin within the connecting rod. The connecting rod bearing; sits inside the big end of the connecting rod.
So, Thrust washers are either separate from the main bearing; or integrated into the one or two of the main shells. Consequently, The thrust washers control the front to back movement of the crankshaft.
So, The cam bearings sit between the cylinder head casting; and the camshaft caps that house the camshaft. Consequently, These bearings may have oil holes for certain engines to help keep the camshaft lubricated.
So, Pin bushings are commonly called small end bushings. They provide relative motion of the piston from the connecting rod. Consequently, Pin bushings are mounted in the small end of the connecting rod.
As long as there’s a steady flow of clean oil, the bearings will generally keep moving along fine. If the oil’s dirty, though, or if the supply is cut off, that’s when the problems start. Bearing lubrication is critical from the second the engine turns over until it is shut down.
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