Frequently Asked Questions About International S1700-S1900 AC Driers & Compressors

Will these AC components fit my specific International S-Series truck year and model?

Our AC driers and compressors are designed to fit International S1700, S1800, and S1900 models from 1989 through 2004. However, compatibility can vary based on your specific engine configuration and whether your truck has factory AC or an aftermarket system. We recommend checking your current compressor's part number or contacting our support team with your VIN for exact fitment verification.

What's the difference between OEM and aftermarket AC compressors for my S-Series truck?

OEM compressors typically use Sanden or Seltec designs and offer exact factory specifications, while aftermarket options often provide similar performance at a lower cost. The main differences include warranty coverage (OEM usually 1-2 years, aftermarket 1 year), mounting bracket compatibility, and clutch assembly design. Both options work well, but OEM units generally require less modification during installation.

How difficult is it to replace the AC drier and compressor myself?

Replacing these components requires intermediate mechanical skills and proper AC service equipment. You'll need to evacuate the system, replace the drier and compressor, add the correct amount of PAG oil (typically 8 oz for full system replacement), and recharge with R134a refrigerant. The physical installation takes 3-4 hours, but without proper evacuation and charging equipment, we recommend professional installation to avoid system damage.

Why should I replace the receiver drier when installing a new compressor?

The receiver drier contains desiccant that absorbs moisture from your AC system. When a compressor fails, it often releases metal particles and debris into the system. A contaminated or saturated drier can't protect your new compressor, leading to premature failure. Replacing both components together (along with flushing the system) ensures optimal performance and protects your investment with typical cost of a drier being only $30-50.

What are the signs my S-Series AC compressor is failing versus other AC problems?

Common compressor failure symptoms include loud grinding or squealing noises when AC is engaged, clutch not engaging despite proper voltage, excessive clutch cycling, or metal shavings in the refrigerant oil. Other AC issues like poor cooling could indicate low refrigerant, clogged orifice tube, or condenser problems. A simple clutch engagement test and system pressure check can help diagnose whether the compressor is the actual problem.