Cummins 4309249 Turbocharger Kit

The Cummins 4309249 turbocharger kit is a genuine OEM repair package designed for Holset HX80 series turbochargers mounted on Cummins KTA38 and KTA38-G diesel engines. This kit includes critical wear components such as journal bearings, thrust bearings, piston ring seals, gaskets, and O-rings required for a complete turbocharger rebuild. It restores rotor assembly clearances and sealing integrity to factory specifications, ensuring optimal boost pressure response and oil control. The kit applies to heavy-duty truck platforms including Dongfeng Tianlong flagship models and various mining machinery equipped with the KTA38 power unit. Component materials feature high-temperature aluminum alloy and steel alloys compatible with exhaust gas temperatures exceeding 750°C. Installation requires adherence to Cummins torque specifications and cleanliness standards to prevent premature failure. Cross-references include Cummins part numbers 4309249NX, 3594097, 3767934, 3803257, and 3801669.