Frequently Asked Questions About International ProStar AC Driers & Compressors

Will these AC components fit my specific year model ProStar?

Our AC driers and compressors are designed to fit International ProStar models from 2008-2017. However, compatibility can vary based on your engine type and whether you have a sleeper or day cab configuration. We recommend checking your VIN or calling our tech support at 1-888-875-7787 with your truck's serial number to ensure proper fitment before ordering.

What's the difference between OEM and aftermarket AC compressors for my ProStar?

OEM compressors typically come with a higher price tag but offer exact factory specifications and often include longer warranties. Our aftermarket options from brands like Red Dot and Sanden provide comparable cooling performance at 30-40% less cost. Both types use the same mounting points and connections. The main differences are in warranty length (1 year aftermarket vs. 2 year OEM) and core charge requirements.

Do I need to replace both the drier and compressor at the same time?

While not always required, replacing both components together is strongly recommended. When a compressor fails, it often sends debris through the AC system that can clog the drier. Installing a new compressor without replacing a contaminated drier can lead to premature compressor failure and void your warranty. Most technicians suggest replacing the drier any time the AC system is opened for major repairs.

What tools and refrigerant amount do I need for installation?

Installation requires basic hand tools, a manifold gauge set, vacuum pump, and refrigerant recovery equipment. ProStar AC systems typically hold 2.75-3.25 lbs of R134a refrigerant, depending on cab configuration. You'll also need PAG 46 oil (amount varies by component). Many customers choose professional installation due to EPA regulations on refrigerant handling. If self-installing, ensure you have proper certification for handling refrigerants.

How can I tell if my AC compressor clutch or the entire compressor needs replacement?

If your AC clutch engages but the compressor doesn't cool, or if you hear grinding noises, the entire compressor likely needs replacement. If the clutch won't engage at all but has power, you might only need a clutch assembly. Check for clutch engagement by watching the center hub when AC is turned on - it should spin with the pulley. Excessive black dust around the clutch indicates wear. Most ProStar compressors come with the clutch pre-installed, making complete replacement the more reliable option.