Frequently Asked Questions About International LT Radiator Tubes, Gaskets & Hoses

What are the exact model years these radiator components fit for the International LT series?

Our radiator tubes, gaskets, and hoses are designed specifically for International LT models from 2017 to present. However, there are variations between early production years (2017-2019) and later models (2020+) due to minor design changes in the cooling system. Always verify your truck's VIN and production date when ordering, as some components may differ based on engine configuration (Cummins X15, International A26, or Detroit DD13/DD15).

Are these aftermarket hoses and tubes as durable as OEM parts?

The aftermarket radiator hoses and tubes we carry are manufactured to meet or exceed OEM specifications. They're made from EPDM rubber compounds rated for temperatures between -40?F to 257?F and feature reinforced fabric layers for burst resistance up to 300 PSI. The metal tubes use heavy-gauge steel with corrosion-resistant coating. Many drivers report these parts lasting 3-5 years under normal commercial use, comparable to factory components at a fraction of the cost.

What tools and experience level are needed to replace these cooling system components?

Replacing radiator hoses typically requires basic hand tools including hose clamp pliers, screwdrivers, and a drain pan. Most hose replacements can be completed in 30-45 minutes by someone with moderate mechanical experience. Radiator tube replacement is more involved, requiring removal of the radiator and potentially the charge air cooler, taking 2-4 hours. We recommend having a service manual handy and allowing extra time for coolant system bleeding to prevent air pockets.

How do I know if I need upper/lower hoses versus bypass tubes or heater hoses?

Check your specific cooling system layout first. Upper radiator hoses connect from the engine outlet to the radiator top tank, while lower hoses run from the radiator bottom to the water pump. Bypass tubes route coolant around the thermostat during warm-up. Common failure signs include coolant leaks at connection points, soft/spongy hose walls, cracking near clamps, or collapsed hoses under vacuum. International LT trucks also have separate transmission cooler lines and CAC tubes that shouldn't be confused with coolant hoses.

Do these gaskets come pre-cut for specific applications or require trimming?

Most radiator and thermostat gaskets for the International LT are pre-cut to exact specifications and ready to install. Water pump gaskets, thermostat housing gaskets, and radiator cap seals are all application-specific. However, some universal coolant tube O-rings and flange gaskets may require selection based on tube diameter (typically 1.75", 2", or 2.5" for LT models). Always clean mating surfaces thoroughly and use appropriate sealant where specified in service bulletins.