Cummins 5524080 Turbocharger Oil Drain Connection

The Cummins 5524080 is a turbocharger oil drain connection designed to provide a sealed passage for lubricating oil returning from the turbocharger bearing housing to the engine oil pan. This component is calibrated for EPA21 compliant 8.9 liter ISC and ISL engine platforms, including ISL9 and QSL9 variants. Constructed from high-temperature resistant cast iron or steel alloy to withstand thermal cycling and oil contamination. The flange-mounted design incorporates a precision-machined sealing surface to prevent leakage under engine operating pressures. Installation requires verification of engine serial number (ESN) for exact fitment confirmation due to potential configuration variations across the 8.9L product line.