International 9300/9370 Charge Air Coolers

Frequently Asked Questions About International 9300/9370 Charge Air Coolers

What does a charge air cooler do on my International 9300/9370?

The charge air cooler (CAC), also called an intercooler, cools the compressed air coming from the turbocharger before it enters the engine's intake manifold. Cooler, denser air improves combustion efficiency, helps the engine produce power more effectively, and reduces strain on internal components. If your charge air cooler is damaged or leaking, you may notice reduced power, increased fuel consumption, or boost-related fault codes.

How do I know if my charge air cooler needs to be replaced?

Common signs of a failing charge air cooler include visible cracks, oil residue or coolant near the fins or end tanks, a noticeable drop in engine power, black smoke from the exhaust, or a boost leak code from the ECM. A pressure test is the most reliable way to confirm a leak before replacing the unit.

Will a replacement charge air cooler fit my specific International 9300 or 9370 model year?

Charge air coolers can vary by engine option, cab configuration, and model year within the 9300/9370 series, so core size, tank design, and mounting points are not always identical across every truck. Always check the listed fitment details on each product page, and compare measurements or part numbers with your existing unit before ordering to confirm compatibility.

Are these charge air coolers new, used, or reconditioned?

Availability depends on the specific listing, as charge air coolers in this category may be offered as new aftermarket units or quality used take-offs. Each product listing will specify the condition, so review that information carefully to understand what you're purchasing and what, if any, warranty coverage applies.

What should I check before and after installing a new charge air cooler?

Before installation, inspect the mounting brackets, hoses, clamps, and seals for wear or damage, since reusing old or brittle components can cause new leaks even with a good cooler. After installation, perform a boost leak test and monitor the truck during initial operation to confirm there are no leaks, unusual noises, or performance issues before returning the truck to full service.