Caterpillar 9N-3367 Coolant Conditioner Element

Caterpillar 9N-3367 Coolant Conditioner Element is a spin-on coolant conditioner cartridge used in Caterpillar machines to maintain coolant quality by replenishing the supplemental coolant additives that protect cooling-system components. This replacement element installs in the Caterpillar coolant conditioner housing as a standard, spin-on cartridge and is one of two available coolant conditioner elements in Cat maintenance programs—the other being a precharge type. When used in Cat conventional coolant systems, the 9N-3367 helps sustain corrosion protection and proper coolant chemistry across service intervals, supporting long-term reliability for heavy‑duty engines in equipment such as excavators, loaders, and trucks. The part is cataloged as 9N-3367 by Cat Parts Store and is referenced in Caterpillar dealer service materials as a spin-on coolant-conditioner element used during PM intervals.