Holset 5499169 HE400WG Turbocharger Assembly

The Holset HE400WG is a single-stage, wastegated turbocharger designed for medium to heavy-duty diesel engines up to 13 liters displacement. This unit utilizes a twin-scroll turbine housing for improved pulse energy utilization and faster transient response. The compressor stage features a high-efficiency forged milled compressor wheel (FMW) for extended operating range and surge margin. The turbine stage incorporates a pneumatic wastegate actuator for precise boost pressure control. The center housing rotating assembly (CHRA) is supported by a floating bearing system with oil lubrication and cooling. This assembly replaces Dongfeng part numbers 5499169 and 5499170, and cross-references to Cummins 3770379, Volvo 21831660, and Weichai 1003162623. Suitable for Dongfeng Tianlong L, Volvo A25F/A30F articulated haulers, and Weichai natural gas engines meeting China VI emission standards. Key service components include the CHRA cartridge (Holset 4030897/6421453H), gasket kit (Holset 4032597), and repair kit (Holset 3575169H). The turbocharger is manufactured by Cummins Turbo Technologies under the Holset brand. Installation requires verification of the specific part number against the engine serial number due to variations in turbine housing A/R ratio and wastegate calibration settings.