Mishimoto 2019+ Ram 6.7L Cummins Expansion Tank - Black

When you're working on your 2019-2025 Ram 2500 with the 6.7L Cummins engine, you want to know the cooling system is solid. The factory plastic expansion tank can become a weak point over time, getting brittle and prone to cracking after years of heat cycles. Mishimoto built this aluminum expansion tank to address that issue head-on, giving you a more reliable part that's designed to last.

This tank is constructed from aluminum with TIG-welded seams, making it much stronger than the original plastic one. It's built to handle the high temperatures and heavy use your Cummins cooling system sees. Inside, you'll find baffles that help keep the coolant stable, especially under load, and prevent air pockets from forming. Air in the cooling system can lead to overheating, so this design helps maintain consistent cooling performance. Installation is straightforward because it's made to fit right in place of your factory tank, and you don't need to drain the whole cooling system to swap it out. It also includes an OEM-style level sensor, so your truck's low coolant warning light will still work just like it did from the factory.

Beyond just being tough, this expansion tank also cleans up the look of your engine bay. The micro-wrinkle black finish gives it a more finished appearance than the stock plastic tank. Mishimoto backs this expansion tank with their Lifetime Warranty, so you can be confident in its durability.