International HX Engine Parts & Cooling

Frequently Asked Questions About International HX Engine Parts & Cooling

What engine options are available for International HX models, and which cooling parts are compatible?

International HX trucks typically come with Cummins X15 or International A26 engines. For the Cummins X15, you'll need cooling components designed for the 2017-newer emission systems, including EGR coolers rated for 475-605 HP applications. The International A26 (13-liter) requires model-specific radiators with 1,400-1,600 square inch core areas. Always verify your engine serial number before ordering, as cooling capacity requirements vary between standard and Performance Series configurations.

How difficult is it to replace the radiator on an HX model, and what tools are required?

Radiator replacement on HX models typically takes 4-6 hours for experienced technicians. You'll need a coolant recovery system, 3/4" and 15/16" wrenches for hose clamps, and potentially a hoist for heavy-duty aluminum radiators weighing 80-120 pounds. The main challenge is accessing the lower mounting bolts behind the charge air cooler. Most customers report needing to remove the front grille assembly and partially drain the AC system if equipped with an integrated condenser.

What are the most common cooling system failures on International HX trucks?

Based on service records, the most frequent issues are EGR cooler failures (typically around 250,000-350,000 miles), water pump bearing failures on high-idle applications, and thermostat housing leaks on 2017-2019 models. The plastic end tanks on OEM radiators can develop stress cracks after 5-7 years, particularly in severe-duty applications. Silicon hose connections at the turbo coolant lines also commonly fail due to heat cycling.

Are aftermarket cooling parts reliable compared to OEM International parts?

Quality aftermarket radiators from established manufacturers like Freightliner, Modine, or Young Touchstone often match or exceed OEM specifications at 30-40% less cost. Look for all-aluminum construction with welded tanks rather than crimped designs. Aftermarket EGR coolers should meet or exceed OEM flow rates of 15-20 GPM and pressure ratings of 30 PSI minimum. Avoid universal-fit water pumps - always choose model-specific units with correct impeller design for your engine code.

What coolant type should I use, and how much does the HX cooling system hold?

International HX models require OAT (Organic Acid Technology) extended life coolant meeting ASTM D6210 specifications - typically red or pink in color. Do not mix with conventional green coolant. System capacity ranges from 52-64 quarts depending on engine and configuration. The Cummins X15 typically holds 56 quarts, while the A26 holds 52 quarts. Always pre-mix coolant 50/50 with distilled water unless using pre-diluted product, and verify freeze protection to -34?F minimum.