Frequently Asked Questions About International S1700-S1900 Radiators

Will these radiators fit my specific International S-Series truck model and year?

Our International S1700-S1900 radiators are designed to fit S-Series trucks manufactured from 1979 through 2001. However, exact fitment depends on your specific engine configuration (DT466, DT360, or DT408) and whether you have manual or automatic transmission. Always verify your radiator core dimensions and inlet/outlet positions before ordering. If you're unsure, contact us with your VIN number and we can help confirm compatibility.

What's the difference between aluminum and copper/brass radiators for my S-Series truck?

Aluminum radiators offer better cooling efficiency and are lighter weight, making them ideal for trucks with higher operating temperatures or modified engines. Copper/brass radiators are more traditional, easier to repair at local shops, and typically last longer in corrosive environments. Most customers choose aluminum for performance and weight savings, while those prioritizing longevity and repairability often select copper/brass units.

Can I install the radiator myself, or do I need special tools?

Installation typically takes 2-4 hours for someone with basic mechanical skills. You'll need standard hand tools, drain pans, and new coolant. The main challenges include properly disconnecting transmission cooler lines (if equipped), ensuring all mounting brackets align correctly, and bleeding air from the cooling system. Many customers report the upper mounting brackets may need slight adjustment. We recommend having a second person help position the radiator during installation.

Are these direct OEM replacements or will I need to modify anything?

Most radiators in this category are designed as direct-fit replacements requiring no modifications. However, some aftermarket options may have slightly different mounting bracket positions or hose connection angles. Common issues include needing to transfer your original overflow fitting or petcock from the old radiator, and occasionally adjusting fan shroud mounting points. Always compare your old radiator's measurements with the new unit before installation.

What size radiator do I need - 2-row, 3-row, or 4-row?

The row count depends on your truck's application and cooling needs. Standard S1700-S1800 models with stock engines typically use 2-row radiators. If you tow heavy loads, operate in extreme heat, or have engine modifications, a 3-row provides extra cooling capacity. 4-row radiators are generally for severe-duty applications or trucks with significant power upgrades. More rows mean better cooling but also restrict airflow slightly, so bigger isn't always better for every application.