Oldsmobile 12480255 Bearing Kit,Connect Rod

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During an engine overhaul, it is essential to replace the main and connecting rod bearings with new ones, but retaining the old bearings is crucial for a close examination to glean valuable insights into the engine's condition. Bearing failure can stem from various factors, including lubrication deficiency, the presence of dirt or foreign particles, engine overload, or corrosion, necessitating immediate correction to prevent recurrence upon engine reassembly. When scrutinizing the bearings, they should be carefully removed from the engine block, main bearing caps, connecting rods, and rod caps, then arranged on a clean surface to facilitate easy identification of any issues and match them with the corresponding crankshaft journal. Foreign particles, which may infiltrate the engine through different avenues, pose a risk to bearing integrity, and thorough cleaning of engine components and maintenance of cleanliness during assembly are essential measures to thwart such failures. Furthermore, regular oil and filter changes are advisable. Lack of lubrication, attributed to factors like excessive heat, overloading, oil leakage, or blocked oil passages, can lead to bearing material damage, often characterized by extrusion from the steel backing or even steel backing discoloration due to overheating. Driving habits, such as full-throttle low-speed operation and short trips, can also exert detrimental effects on bearing life, causing fatigue failure or corrosion due to insufficient engine heat and accumulation of corrosive substances in the engine oil. Finally, incorrect bearing installation during engine assembly, marked by tight-fitting bearings or the entrapment of dirt or foreign particles, can result in insufficient oil clearance and high spots on the bearing, ultimately culminating in bearing failure.