Frequently Asked Questions About International 9900/i/ix Radiator Tubes, Gaskets & Hoses

Will these radiator hoses fit my specific International 9900 model year?

Our radiator hoses and tubes are designed to fit International 9900, 9900i, and 9900ix models from 1999 through 2016. However, compatibility can vary based on your specific engine configuration (CAT, Cummins ISX, or Detroit). Always verify your engine model and radiator type before ordering. If you're unsure, check your VIN or contact us with your truck's details for exact fitment confirmation.

What's the difference between OEM and aftermarket radiator hoses, and which should I choose?

OEM hoses are manufactured to exact factory specifications and typically feature reinforced rubber construction with wire spiral reinforcement. Aftermarket options often use EPDM rubber compounds that offer similar heat resistance (up to 250?F) and pressure ratings at a lower cost. For daily drivers, quality aftermarket hoses perform comparably to OEM. For severe-duty applications or if you want exact factory fit, OEM is recommended.

How difficult is it to replace radiator hoses on a 9900, and what tools do I need?

Replacing radiator hoses typically takes 2-4 hours depending on which hoses you're changing. You'll need basic hand tools including hose clamp pliers, a coolant drain pan (5-10 gallons), and potentially a hose pick for stubborn connections. Upper hoses are generally easier to access, while lower hoses may require removing the splash shield. Always replace hose clamps when installing new hoses, and expect to refill 8-12 gallons of coolant depending on your system.

How can I tell if my radiator hoses need replacement before they fail?

Inspect hoses every oil change for these warning signs: soft or spongy spots when squeezed, hard or brittle texture, visible cracks or splitting at connection points, swelling or ballooning, and coolant residue around clamps. The typical lifespan is 4-6 years or 400,000-600,000 miles. Replace hoses showing any deterioration immediately - a roadside failure costs far more than preventive replacement.

Do I need to replace gaskets when changing radiator hoses?

While hose connections don't require gaskets, it's wise to inspect and replace related cooling system gaskets during hose service. Check your thermostat housing gasket, water pump gaskets, and radiator tank gaskets for leaks or deterioration. These gaskets are inexpensive and replacing them during hose service prevents future coolant leaks. Always use coolant-compatible sealant where specified by your engine manufacturer.