EGR Cooler Kit for International RXT (2006-2007) 9.3L

Heavy-Duty Stainless EGR Cooler Kit for 2006-2007 International RXT (XT Platform)

What it Does: The EGR Cooler Kit lowers recirculated exhaust gas charge temperatures on the 2006-2007 International RXT to protect the intake tract from thermal overloading and restore factory emissions performance.

The Stock International RXT Heat Exchanger Failure

The factory heat exchanger on the Navistar DT570 platform relies on thin-walled interior cooling tubes secured with standard brazed joints. Under severe heavy-duty thermal cycling and soot exposure, these factory cores succumb to fatigue cracking and sulfurous acid pitting. Internal failure breaches the coolant jacket, forcing pressurized coolant into the exhaust stream. This causes white exhaust smoke, rapid coolant loss without external puddling, elevated combustion temperatures, and persistent EGR diagnostic trouble codes that can force limp-mode derates.

The Engineering Solution

This replacement round-style cooler is manufactured with reinforced stainless steel tubing designed to withstand extreme diesel thermal shock and corrosive exhaust soot. Measuring approximately 11.5 inches in length, the assembly features precision TIG-welded ends that resist thermal fatigue far better than factory brazing. By providing consistent heat transfer to the cooling jacket, it prevents hot spots and preserves intake air density. Direct-fit alignment ensures leak-free integration with the engine's coolant circuit, replacing OEM units marked 1871733C92 and 1871733C93 without modifications.

What's Included

• 1 Round Stainless Steel EGR Cooler (approx. 11.5 in)
• 1 Coolant Tube
• 1 Mounting Bracket Clamp
• 2 Hose Clamps
• 1 Exhaust Ring Gasket
• 1 Triangle Flange Gasket
• 3 O-Rings
• 3 Fastener Bolts

Technical Specifications

Compatibility

• 2006 International RXT 9.3L Navistar DT570 / HT570 Diesel
• 2007 International RXT 9.3L Navistar DT570 / HT570 Diesel

Frequently Asked Questions & Fitment Warnings

Does this fit the XT Platform RXT?

Yes, this is a direct fit for the 2006-2007 International RXT equipped with the DT570 9.3L engine; verify your original core matches the 11.5-inch round style before ordering.

Do I need to bleed the cooling system after replacement?

Yes, the cooling system must be fully drained, refilled, and bled of air pockets during installation to prevent localized hot spots and immediate thermal stress on the replacement core.

The International Hauling Standard

Engineered for high-tonnage hauling and demanding highway cycles, this emissions-compliant heat exchanger ensures stable operating temperatures and leak-free reliability under sustained heavy trailer loads.