Lincoln C2OZ-6211-V Bearing - Connecting Rod

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When lack of lubrication is the cause of bearing failure, the bearing material is wiped or extruded from the steel backing of the bearing. Temperatures may increase to the point where the steel backing turns blue from overheating.

Bearing failure occurs because of lack of lubrication, the presence of dirt or other foreign particles, overloading the engine, and corrosion. Regardless of the cause of bearing failure, it must be corrected before the engine is reassembled to prevent it from happening again.

When inspecting the bearings, they should be removed from the engine block, main bearing caps, connecting rods, and rod caps, and arranged in a corresponding position to their location in the engine.

Dirt and other foreign particles can get into the engine in a variety of ways. They may be left in the engine during assembly, pass through filters or the PCV system, get into the oil, and from there into the bearings. Metal chips from machining operations and normal engine wear are often present. Abrasives are sometimes left in engine components after reconditioning, especially when parts are not thoroughly cleaned using the proper cleaning methods.

Factors such as insufficient lubrication, the presence of dirt or foreign particles, engine overloading, and corrosion can cause bearing failure.

Factors such as insufficient lubrication, the presence of dirt or foreign particles, engine overloading, and corrosion can cause bearing failure.

Bearing failure occurs because of lack of lubrication, the presence of dirt or other foreign particles, overloading the engine, and corrosion. Regardless of the cause of bearing failure, it must be corrected before the engine is reassembled to prevent it from happening again.

Dirt and other foreign particles can get into the engine in a variety of ways. They may be left in the engine during assembly, pass through filters or the PCV system, get into the oil, and from there into the bearings. Metal chips from machining operations and normal engine wear are often present. Abrasives are sometimes left in engine components after reconditioning, especially when parts are not thoroughly cleaned using the proper cleaning methods.

Driving habits can have a definite effect on bearing life. Full throttle, low-speed operation (lugging the engine) puts very high loads on bearings, which tends to squeeze out the oil film. These loads cause the bearings to flex, producing fine cracks in the bearing face (fatigue failure). Short trip driving leads to corrosion of bearings because insufficient engine heat is produced to drive off the condensed water and corrosive gases. These products collect in the engine oil, forming acid and sludge, which attacks and corrodes the bearing material.

When examining the bearings, remove them from the engine block, the main bearing caps, the connecting rods, and the rod caps, and lay them out on a clean surface in the same general position as their location in the engine. This will enable you to match any bearing problems with the corresponding crankshaft journal.