Description
Expansion tank for the 2019+ Ram 6.7L Cummins — the Mishimoto Expansion Tank Natural Aluminum provides a durable replacement to the factory plastic reservoir, improving long-term reliability against heat-cycle degradation and cracking.
The factory expansion tank on the 2019+ Ram 6.7L Cummins is a known weak point: made from plastic, it becomes brittle over time and is prone to cracking, discoloration, and internal degradation after thousands of heat cycles. Mishimoto’s natural aluminum construction directly addresses these failure modes by replacing the susceptible plastic with a metal reservoir engineered for sustained thermal exposure and long-term service life.
Why the aluminum tank matters
- Aluminum construction — resists the brittleness and cracking associated with repeated thermal cycling in plastic tanks, reducing the likelihood of coolant loss and related engine overheating events.
- Improved visual durability — natural aluminum resists discoloration and internal degradation that commonly affects stock plastic tanks, maintaining a serviceable appearance and predictable performance over time.
- Direct replacement fit — designed for the 2019+ Ram 6.7L Cummins to replace the factory unit and restore system reliability without modifying the cooling system layout.
Performance and service considerations
This Mishimoto expansion tank is specified for compatibility with the 2019+ Ram 6.7L Cummins and intended to mitigate the common failure pathways of the OEM plastic tank. Selecting a metal reservoir targets longevity and reduces the risk of coolant leaks and associated downtime, supporting continued engine cooling performance in demanding duty cycles.
Brand: Mishimoto — known for engineered cooling components designed to address OEM weaknesses and support reliable performance in high-heat applications.
Product Vendor: Mishimoto
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