Description

The Cummins Piston Pin / Connecting Rod Bushing 3913990 is a precision-engineered small-end bushing designed for Cummins 6C 8.3 diesel engines . This bushing is installed in the connecting rod’s small end and provides a smooth, durable bearing surface for the piston pin when used with piston 9247 kits . Manufactured to OEM specifications , the Cummins 3913990 rod bushing is produced from high-quality bearing material engineered to handle high loads, continuous oscillation, and elevated operating temperatures. Proper piston pin bushing fitment is critical for maintaining correct piston alignment, reducing friction, and preventing premature wear of the piston pin and connecting rod. This bushing is commonly replaced during connecting rod reconditioning, piston and pin replacement, in-frame rebuilds, and complete engine overhauls . Replacing the rod bushing ensures correct piston-to-rod clearance and helps extend overall engine service life. The Cummins 3913990 piston pin bushing is ideal for professional engine builders, diesel repair shops, and fleet maintenance operations servicing Cummins 8.3L engines.