Garrett 738769-5003 GT22 Turbocharger Assembly

This GT22 frame turbocharger is engineered for the BJ493ZLQ series 2.771L four-cylinder diesel engines rated at 80 kW (107 HP) at 3600 RPM. The unit features a cast iron turbine housing designed for high exhaust temperature durability, an aluminum alloy compressor housing, and a water-cooled center bearing housing assembly to manage thermal loads in light commercial vehicle duty cycles. The compressor wheel utilizes extended tip technology for improved airflow efficiency at target pressure ratios. The turbine wheel is manufactured from high-nickel alloy (Inconel 713C equivalent) for resistance to thermal fatigue. The wastegate actuator is pneumatically controlled, calibrated for the specific engine torque curve (245 Nm @ 2200 Nm for BJ493ZLQ1 variant). The rotor assembly is dynamically balanced to ISO 1940 G2.5 standards. The bearing system employs full-floating journal bearings with thrust bearing control, lubricated and cooled by engine oil and coolant circuits. Inlet and outlet flange dimensions conform to the OEM engine exhaust manifold and intake piping interfaces for direct bolt-on installation. The unit meets China National 2 and National 3 emission requirements when matched to the calibrated ECU and fuel system (VE pump or Common Rail). Major OEM cross-references include Foton E049339000128, E049339000292, E049339000054, E049339000222, E049339000080, and E049339000284. Garrett manufacturer part numbers include 738769-5003, 738769-5007, and 720618-5003. WeiFu variant referenced as 1156800002-1.