Aftermarket Parts Specialist certified

Aftermarket Parts Specialist

OEM-Equivalent Quality Assurance certified

OEM-Equivalent Quality Assurance

Heavy Duty Radiator Caps

Explore Radiator Supply House's Heavy Duty Radiator Caps, along with oil coolers, complete cooling packages, and coolant reservoir and surge tanks. These direct-fit aftermarket replacements serve construction and trucking equipment needs across the USA. OEM part numbers are cross-referenced for accurate fitment.

Heavy Duty Radiator Caps

Our Range of Products

Reservoir Tank Collection

Reservoir Tank Collection

  • 39 reservoir tanks for 20+ brands
  • OEM-compatible for heavy equipment & trucks
  • Priced from $311 to $1,916
Kenworth T800 Radiators

Kenworth T800 Radiators

  • Direct OEM fit for T600/T800/W900
  • Multiple core configs: 4 to 7-row
  • Includes TG3604 gasket kit
International 4700 Radiators

International 4700 Radiators

  • OEM replacement for International 3000-4900
  • High-fin design for max heat dissipation
  • All-aluminum or steel/copper options
Freightliner M2 106 Radiators

Freightliner M2 106 Radiators

  • Direct OEM fit for Freightliner M2 106
  • All-aluminum or plastic-tank construction
  • Optional internal oil cooler integration
Ford L9000 Radiators for Sale

Ford L9000 Radiators for Sale

  • OEM-compatible tank for Ford L9000
  • 52 bolt holes for precise fitment
  • 2.5-inch hose connection design
Freightliner Columbia Radiators

Freightliner Columbia Radiators

  • Direct-fit for Freightliner Columbia 120
  • All-aluminum or plastic-aluminum builds
  • Internal oil cooler for engine protection

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Frequently Asked Questions

What is the best radiator cap to use?

The best radiator cap depends on your equipment's specified pressure rating and cooling system design. For heavy duty machinery like Caterpillar, Komatsu, or John Deere equipment, always use a cap rated to the OEM pressure specification. Using an incorrect pressure rating can cause coolant loss, overheating, or system damage. Radiator Supply House stocks OEM-equivalent caps matched to specific makes and models.

What heavy equipment brands do your radiator caps fit?

Can I use these radiator caps on GenSet and industrial power equipment?

Are your radiator caps OEM-equivalent quality?

How do I find the correct radiator cap for my equipment model?

Do you supply cooling accessories beyond radiator caps?

Do you ship radiator caps internationally or only within the USA?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Construction & Mining

Construction & Mining

Radiator caps for Caterpillar, Komatsu, and John Deere excavators, dozers, and loaders used on demanding job sites.

Commercial Trucking & Freight

Commercial Trucking & Freight

Cooling system caps for Peterbilt, Freightliner, and KW long-haul and vocational trucks in fleet operations.

Power Generation & Industrial

Power Generation & Industrial

Radiator caps for GenSet and MTU-powered industrial generators used in continuous-duty power generation facilities.

Oil & Gas Equipment

Oil & Gas Equipment

Cooling components for MTU fracking and high-temperature industrial equipment used in oil and gas operations.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Construction & Fleet Operators Choose Radiator Supply House

300+ Manufacturer Coverage

We stock cooling components for over 300 equipment brands including Caterpillar, Komatsu, John Deere, Freightliner, and Peterbilt — all in one place.

Hard-to-Find Parts, In Stock

Access radiator caps and cooling accessories for specialized configurations including GenSet, desert-upgrade, and fracking equipment that most suppliers don't carry.

Complete Cooling System Solutions

From radiator caps and drain plugs to full cooling packages, Radiator Supply House is your single source for every cooling system need.

Need the Right Radiator Cap? Let Us Help.

Submit your equipment details and our cooling system specialists will confirm compatibility and availability fast.

Contact Us Today

For immediate assistance, feel free to give us a direct call at +1 888-549-4367.