Frequently Asked Questions About International 9300/9370 AC Driers & Compressors

Will these AC components fit my specific International 9300 or 9370 model year?

Our AC driers and compressors are designed to fit International 9300 and 9370 models from 1987 through 2003. However, there are variations based on engine type and original equipment specifications. We recommend checking your VIN or existing part numbers before ordering. Most fitment issues occur when customers have aftermarket AC systems installed. If you're unsure, contact us with your truck's VIN and we'll verify compatibility.

What's the difference between OEM and aftermarket AC compressors for these trucks?

OEM compressors typically use Sanden or Seltec units with aluminum housings, while aftermarket options often feature steel construction. The main differences are weight (aftermarket units are usually 3-5 lbs heavier) and longevity. OEM-style compressors generally last 150,000-200,000 miles with proper maintenance, while quality aftermarket units average 100,000-150,000 miles. Both require the same mounting brackets and refrigerant capacity (typically R134a at 2.5-3.5 lbs depending on system configuration).

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

Yes, we strongly recommend replacing both components together. When a compressor fails, it often releases metal particles and debris into the AC system. If you only replace the compressor without changing the drier, these contaminants can damage your new compressor within weeks. The drier acts as a filter and moisture absorber - a contaminated drier won't protect your new compressor. This is why most warranties require drier replacement for coverage.

What tools and additional parts do I need for installation?

You'll need a vacuum pump, manifold gauge set, and refrigerant recovery equipment for proper installation. Additional parts typically required include new o-rings (specific to your fittings), 8-12 oz of PAG oil, replacement belt, and 2.5-3.5 lbs of R134a refrigerant. Many customers overlook the need for new mounting bolts - the originals often corrode. Installation takes 3-5 hours for experienced mechanics. If your system hasn't been serviced recently, budget for potential line or condenser replacement.

Why do these AC compressors fail prematurely on International 9300/9370 trucks?

The most common failure causes are inadequate oil levels (these trucks require frequent oil checks due to long idle times), worn clutch bearings from constant engagement, and contamination from not replacing the drier during previous repairs. The mounting location on these models also exposes compressors to excessive road spray and debris. To maximize lifespan, check oil levels every 3 months, ensure proper belt tension (1/2 inch deflection), and clean the clutch assembly annually. Running the AC for 10 minutes monthly during winter prevents seal deterioration.