International S1700-S1900 Engine Parts & Cooling

Frequently Asked Questions About International S1700-S1900 Engine Parts & Cooling

What years do these engine parts fit, and how do I know if they're compatible with my specific S1700-S1900 model?

These parts are designed for International S1700-S1900 series trucks typically manufactured from the late 1970s through the 1990s. To ensure compatibility, check your OEM plate located on the driver's side door jamb or frame rail. The 10th digit indicates the year, and you'll need your engine model number (usually found on the valve cover or engine block). Common engines include DT466, DT360, and DT408. Always cross-reference part numbers with your engine serial number before ordering.

Are aftermarket cooling system parts reliable compared to OEM, and what brands do you recommend?

Quality aftermarket cooling parts can match or exceed OEM specifications when sourced from reputable manufacturers. We carry heavy-duty aluminum radiators that often outlast original equipment. Look for parts that meet or exceed SAE standards. Aftermarket water pumps should feature cast iron or aluminum construction with sealed bearings for longevity.

What are the most common cooling system failures on these engines, and what parts should I keep on hand?

The most frequent issues include thermostat failure (stuck open or closed), radiator hose deterioration, and water pump bearing failure. Essential spare parts include upper and lower radiator hoses, thermostat (typically 180-degree), coolant temperature sensor, radiator cap, and fan belts. These engines are also prone to head gasket issues if overheated, so maintaining proper coolant levels and replacing worn cooling components promptly is critical.

Do I need special tools to replace cooling system components, and what's the typical installation time?

Most cooling system repairs require basic hand tools: socket set, screwdrivers, pliers, and drain pan. For water pump replacement, you may need a pulley puller. Thermostat replacement typically takes 30-45 minutes, radiator hose replacement 20-30 minutes per hose, and water pump replacement 2-3 hours. Always allow extra time for system draining, refilling, and bleeding air pockets. A cooling system pressure tester is recommended but not required.

What coolant type should I use, and are there any specific maintenance intervals for these older engines?

Use heavy-duty diesel engine coolant (ELC or conventional) with supplemental coolant additives (SCAs) to prevent cavitation and liner pitting. For conventional coolant, test SCA levels every 3 months or 15,000 miles. Change coolant every 2 years or 200,000 miles for ELC, or annually for conventional coolant. These engines hold approximately 8-12 gallons depending on configuration. Never mix different coolant types, and always use distilled water for mixing if using concentrate.