Insufficient lubrication: The rod bearing needs a constant supply of clean oil to function property. If the oil supply is inadequate due to low oil levels or a blocked oil passage, the bearing can overheat, leading to premature failure.
Increased load or stress: Excessive load on the rod bearing can occur due to several factors, such as a high-performance engine operating at a higher temperature, inadequate valve clearance, or a damaged piston that puts an abnormal side load on the connecting rod.
Poor bearing material or manufacturing defect: The quality of the bearing material and manufacturing process plays a crucial role in bearing longevity. Substandard or defective bearing can fail prematurely.
Debris or contamination: Contaminants such as dirt, metal shavings, or other particles can enter the bearing and cause wear and damage to the bearing surface.
Improper installation: If the connecting rod bearings are not installed correctly or torqued to the proper specifications, it can lead to improper seating and premature failure.
Inadequate cooling: In some instances, insufficient cooling of the bearing area can cause the bearing to overheat and fail. This can occur due to a faulty cooling system or inadequate oil flow to the bearing.
