Caterpillar Radiator Caps

Radiator caps on Caterpillar equipment should generally be inspected at every major service interval and replaced every 2–3 years or whenever the pressure seal shows wear, cracking, or the cap fails a pressure test. In high-temperature or demanding environments such as desert or mining operations, more frequent inspection and earlier replacement is strongly recommended.

Caterpillar equipment uses radiator caps with varying pressure ratings depending on the model and application. Common ratings range from 7 to 15 PSI. Always consult your Cat service manual or cross-reference the OEM part number to confirm the correct pressure rating for your specific machine, as using the wrong cap can cause coolant loss or overheating.

Signs of a failing Cat radiator cap include coolant loss without visible leaks, overheating, collapsed radiator hoses, or coolant overflow after the engine cools. A pressure test using a radiator cap tester is the most reliable diagnostic method. If the cap cannot hold its rated pressure, it should be replaced immediately to prevent engine damage.

Yes, quality aftermarket radiator caps built to OEM-equivalent specifications are fully compatible with Caterpillar equipment. Radiator Supply House supplies ICEBOX replacement parts designed to meet or exceed OEM standards for fit, pressure rating, and sealing performance across a wide range of Cat models including dozers, excavators, motor graders, and generator sets.

The catalog covers an extensive range of Caterpillar equipment including the D11N, D5, D5B, and D4B dozers, 324D excavator, 950G II wheel loader, C15 and C18 engines, and 353 GenSet configurations. Desert upgrade and specialized fracking versions are also available. Contact Radiator Supply House with your model number for a compatibility confirmation.

Yes. Radiator Supply House offers specialized high-temperature and desert-upgrade cooling components designed for Cat equipment operating in demanding conditions such as open-pit mining, oil and gas fracking sites, and arid desert environments. These variants are engineered to maintain reliable cooling system performance where standard components may be insufficient.

Beyond radiator caps, Radiator Supply House supplies a complete range of Caterpillar cooling system parts including radiators, radiator cores, charge air coolers, oil coolers, and complete cooling packages. This makes Radiator Supply House a single source for all Cat cooling system maintenance, repair, and upgrade needs.