Cummins 3283179 Camshaft Assembly

The Cummins 3283179 camshaft is a critical valve train component engineered for the 5.9L 6-cylinder B series diesel engines, including 6BT, 6BTA, ISB, and QSB variants. Manufactured from forged alloy steel with induction-hardened journals and cam lobes, it ensures high fatigue strength and wear resistance under heavy-duty operating cycles. This camshaft regulates valve timing for intake and exhaust events, directly influencing engine breathing, combustion efficiency, and emissions compliance. It interfaces with the camshaft gear, thrust plate, and bushings within the gear housing. Designed as a direct OEM replacement for Cummins part numbers 3283179 and 3929886, it restores factory valve lift profiles and duration specifications. Compatible with Dongfeng Cummins joint venture production engines used in Dongfeng Tianlong Flagship and Dfac heavy-duty truck platforms, as well as bus and industrial power unit applications.