Description

The Cummins Connecting Rod Bearing RB-3802073 (0.25 mm undersize) is an OEM-spec bearing shell engineered for diesel engines that require corrected oil clearance after light crankshaft journal regrinding . This bearing directly replaces OE part number 3802073 , delivering precise fitment, stable oil film control, and long-term bottom-end protection in Cummins diesel engines . Undersized rod bearings are critical during professional engine rebuilds when crankshaft journals have been machined to remove wear or surface damage. The 0.25 mm undersize specification compensates for material removal while maintaining correct bearing crush and oil clearance, preventing metal-to-metal contact under high combustion loads. Manufactured from premium bearing alloys with advanced overlay technology, the RB-3802073 rod bearing offers excellent fatigue resistance, load-carrying capacity, and protection during cold starts and continuous-duty operation. Precision shell geometry ensures even load distribution across the crankshaft journal, helping extend crankshaft and bearing life. This bearing is commonly installed during engine rebuilds, bottom-end overhauls, crankshaft reconditioning, and professional remanufacturing projects . It is trusted by diesel technicians and engine builders who require OEM-level accuracy and durability. Cross-Reference & Fitment Aftermarket Reference: RB-3802073 OEM Reference: 3802073 Size: 0.25 mm Undersize Application: Connecting rod bearing Fitment Note: Use only with crankshafts ground 0.25 mm undersize