Cummins 3999813 Turbocharger Oil Drain Connection

The Cummins 3999813 turbocharger oil drain connection serves as the critical interface between the turbocharger center housing and the engine block or oil pan return port. Manufactured to OEM specifications, this component facilitates gravity-fed oil drainage from the turbocharger bearing cartridge back to the crankcase, preventing oil accumulation and seal leakage. Constructed from high-strength cast iron or steel alloy to withstand thermal cycling and vibration inherent in heavy-duty diesel applications. The flanged design incorporates precision-machined sealing surfaces compatible with OEM gaskets. This part corresponds to Cummins turbocharger type WGT (Wastegate Turbo) configurations with high-mount oil filter and dry exhaust manifold requirements. Direct OEM cross-reference includes part number 4931948.