Kenworth W900B/W900L Charge Air Coolers

Frequently Asked Questions About Kenworth W900B/W900L Charge Air Coolers

What does a charge air cooler do on my Kenworth W900B/W900L?

A charge air cooler, also known as an intercooler, cools the compressed air coming from the turbocharger before it enters the engine. Cooler, denser air improves combustion efficiency, helps the engine produce more power, and reduces strain on internal components. If your charge air cooler is damaged or leaking, you may notice reduced power, increased fuel consumption, or check engine lights related to boost pressure.

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

Common signs of a failing charge air cooler include visible cracks, leaks, or dents in the core or end tanks, oil residue around the fins, loss of engine power, black smoke from the exhaust, or boost pressure fault codes. A pressure test can confirm leaks that are not visible during a simple inspection.

Will a charge air cooler listed here fit my specific W900B or W900L model year?

Charge air coolers can vary by engine type, cab configuration, and production year even within the W900B and W900L lineup. Always check the listed specifications, including part number and dimensions, against your original unit before ordering. If you are unsure about fitment, having your VIN and engine information on hand will help our team confirm compatibility.

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

Availability can include new aftermarket units, genuine OEM replacements, and quality used or reconditioned coolers pulled from salvaged trucks. Each product listing specifies the condition, so you can choose based on your budget and performance needs. Used units are typically inspected for cracks, leaks, and core damage before being offered for sale.

What should I check before installing a replacement charge air cooler?

Before installation, inspect the mounting brackets, hoses, clamps, and seals connected to the cooler, since worn or damaged components can cause new leaks even with a good cooler. It is also a good practice to pressure test the new or used unit prior to installation and to replace any cracked hoses or worn clamps at the same time to avoid repeat failures.