Radiator Caps in Engine Cooling

A radiator cap is small but important in engine cooling. It seals the radiator and keeps the cooling system under proper pressure. When the coolant heats up, the cap allows overflow into the recovery tank. By contrast, coolant flows back, which prevents overheating and keeps coolant circulating efficiently. Also, radiator caps provide a good seal when the coolant expands. Therefore, a failed radiator cap may result in low coolant levels, hose collapse, or temperature issues. Need it? Welcome to shop for a new one at FridayParts, with a compatible guarantee and a 90-day return.

OEM-Quality Radiator Cap Catalog

Find radiator caps that fit a wide range of off-road equipment. We offer caps compatible with:

Brands: Kubota, Yanmar, CAT, Perkins, Hitachi, Bobcat, Thermo King, Komatsu, etc.

Equipment type: Tractor, Excavator, Loader, Forklift, Generator, Mower, Utility Vehicle, and more.

We ensure our cap can meet OEM standards and fit like the original. Because there are different radiator cap types with varying pressure ratings(usually around 13–16 PSI), please always match the pressure and fit with your machine’s specifications.

Radiator Cap Prices

FridayParts offers quality aftermarket radiator caps at competitive prices. The cost of a replacement radiator cap ranges from $9.99 to $41.58 here. Compared to OEM parts, our aftermarket options save money while maintaining reliability. If you plan to replace it by yourself, it will save you more. As a one-stop online store, we also offer other quality parts for the cooling system. Explore our website now.