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International WorkStar AC Driers & Compressors
Frequently Asked Questions About International WorkStar AC Driers & Compressors
Will these AC components fit my specific International WorkStar model year?
Our AC driers and compressors are designed to fit International WorkStar models from 2008-2018. However, compatibility can vary based on your engine type (MaxxForce or Cummins) and specific VIN series. We recommend checking your existing part numbers or contacting our support team with your VIN to ensure proper fitment. Most WorkStar 7300, 7400, and 7500 series trucks use similar AC systems, but variations exist between model years.
What's the difference between OEM and aftermarket AC compressors for my WorkStar?
OEM compressors typically come with Sanden or Denso branding and carry a higher price point but offer exact factory specifications. Our aftermarket options from brands like Red Dot and MEI provide comparable cooling performance at 30-40% less cost. The main differences are warranty length (OEM usually 2 years, aftermarket 1 year) and clutch assembly quality. For trucks with over 200,000 miles, many customers find aftermarket options provide excellent value without sacrificing reliability.
Do I need to replace both the AC drier and compressor at the same time?
While not always necessary, replacing both components together is strongly recommended if your compressor has failed. A failed compressor often releases metal debris into the AC system, which gets trapped in the drier. Installing a new compressor without replacing a contaminated drier can lead to premature compressor failure within 3-6 months. If only your drier has moisture damage but the compressor still functions properly, you can replace just the drier.
What tools and refrigerant type do I need for installation?
Installation requires basic hand tools, a manifold gauge set, vacuum pump, and refrigerant recovery equipment. International WorkStar trucks use R-134a refrigerant, with system capacities typically ranging from 2.5 to 3.5 pounds depending on your cab configuration. You'll also need PAG 46 oil for the compressor (usually 6-8 ounces). Professional installation is recommended as improper evacuation or oil levels can damage the new components. Many shops charge $200-400 for installation.
How can I tell if my AC compressor clutch or the entire compressor needs replacement?
If your AC clutch engages but the center hub doesn't spin, only the clutch assembly needs replacement (typically $150-250). However, if you hear grinding noises, see metal shavings in the refrigerant oil, or the compressor shaft won't turn by hand, the entire compressor requires replacement. Low cooling with proper refrigerant levels often indicates internal compressor wear. A simple amp draw test can help diagnose - healthy compressors pull 3-5 amps, while failing units often exceed 7-8 amps.