Description

The Cummins Connecting Rod Bearing C3901170 (Standard Size) is a precision-engineered bearing shell designed to maintain correct oil clearance, crankshaft journal protection, and long-term durability in Cummins diesel engines . Manufactured to OEM specifications, this rod bearing ensures accurate fitment, smooth rotation, and reliable bottom-end performance. Connecting rod bearings play a critical role in supporting the crankshaft journals while handling extreme combustion loads and high RPM operation. The C3901170 STD rod bearing is intended for engines with crankshaft journals that remain within factory specifications. For reground crankshafts, multiple undersize options are available to restore proper oil clearance and prevent premature wear or bearing failure. These bearings are produced using high-quality bearing alloys with advanced overlay technology, offering excellent load-carrying capacity, fatigue resistance, and protection against metal-to-metal contact. Precision shell geometry promotes even load distribution, stable oil film retention, and reduced friction during continuous heavy-duty operation. The Cummins C3901170 connecting rod bearing is commonly installed during engine rebuilds, bottom-end overhauls, crankshaft machining repairs, and professional remanufacturing projects . It is trusted by diesel technicians, fleet maintenance teams, and engine builders who require OEM-level reliability and long service life. Available Size Options STD: C3901170 0.25 mm Undersize: C3901171 0.50 mm Undersize: C3901172 0.75 mm Undersize: C3901173