Western Star

For reliable Western Star truck performance, trust American Radiator’s premium line of Western Star charge air coolers. A properly functioning charge air cooler (CAC) is essential to reduce intake temperatures, improve fuel efficiency, and protect your engine. We stock direct-fit Western Star intercoolers for popular models like the Western Star 4900, 4700, 5700XE, and 6900, ensuring you get the right fit fast.

Choose from our standard aluminum charge air cooler backed by a two-year, unlimited mileage warranty, or upgrade to the bar-and-plate severe duty design with a lifetime warranty—built for heavy haul, construction, and vocational truck applications. Every aftermarket Western Star charge air cooler is engineered to meet or exceed OEM standards for cooling, durability, and airflow.

As a trusted Western Star truck parts supplier, American Radiator offers not only new intercoolers but also professional CAC repair services, giving you flexible options to maximize uptime. With Famous Same Day Shipping, competitive pricing, and expert support, we make it easy to buy, replace, or repair Western Star charge air coolers nationwide.

Boost your truck’s reliability with an aftermarket Western Star intercooler from American Radiator—the proven choice for heavy-duty cooling solutions.

FAQ'S

What Western Star models are compatible with your charge air coolers?
Our charge air coolers fit a variety of Western Star trucks—such as the 4900, 5700, and 6900—matching OEM inlet/outlet layouts, mounting points, and airflow specifications.

What is the difference between bar & plate and tube & fin cooler designs?
Bar & plate coolers offer superior durability, resistance to clogging, and thermal stability under heavy load. Tube & fin coolers are generally lighter and offer good thermal performance in less severe conditions.

How do I choose the correct charge air cooler for my Western Star engine?
Use your OEM part number or measure your current cooler’s core dimensions, boost rating, and port layout. Then match those specs with available options in the catalog to find a proper replacement.

Can I replace just the charge air cooler without replacing hoses and clamps?
Yes — you can often replace only the cooler if your existing hoses, clamps, and piping are in good condition. However, replacing the associated components at the same time can enhance reliability and prevent leaks.

What signs indicate my Western Star charge air cooler is failing?
Look for symptoms such as loss of boost, reduced engine performance, higher intake air temps, visible oil or coolant leakage, or damaged or warped fins. Addressing these early helps restore efficiency and protect your engine.