Cummins 3934085 Turbocharger Oil Drain Connection

The Cummins 3934085 is a turbocharger oil drain connection designed to route lubricating oil from the turbocharger bearing housing back to the engine crankcase. Manufactured to OEM specifications, this component ensures a leak-free seal under high-temperature operating conditions typical of B-series and ISB/QSB diesel engines. Constructed from high-strength metal alloy (cast iron/steel) to withstand thermal cycling and vibration. The assembly includes the connection flange and tube structure. Direct replacement for Cummins part number 3934085. Compatible with Cummins 4BT, 6BT, 6BT5.9, ISB, QSB, and related B-series engine platforms used in construction machinery, commercial trucks, and industrial power units.