Ford E63Z-6211-C Bearing - Connecting Rod

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For an engine overhaul, it is recommended to replace the main and connecting rod bearings with new ones. Addressing the cause of bearing failure is essential before assembling the engine to prevent its recurrence. When inspecting bearings, take them off from the engine block, main bearing caps, connecting rods and rod caps, arranging them in a corresponding position. The foreign materials can be embedded into the bearing material causing damage to it. Lack of lubrication which arises from causes like excessive heat, overload, oil leakage or blockage of oil passages may lead to material breakdown of bearings.

Retaining the old bearings is valuable as they may provide insights into the engine's condition.

The best prevention is to clean all parts thoroughly and keep everything spotlessly clean during engine assembly. Frequent and regular engine oil and filter changes are also recommended.

It is recommended to replace the main and connecting rod bearings with new ones.

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.

Excessive heat (which thins the oil), overloading (which squeezes the oil from the bearing face), and oil leakage or throw off (from excessive bearing clearances, worn oil pump, or high engine speeds) all contribute to lubrication breakdown. Blocked oil passages, usually the result of misaligned oil holes in a bearing shell, will also oil starve a bearing and destroy it.

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, which produces fine cracks in the bearing face (fatigue failure). Eventually, the bearing material will loosen in pieces and tear away from the steel backing. 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. As the oil is carried to the engine bearings, the acid attacks and corrodes the bearing material.