Frequently Asked Questions About International 9300/9370 Air Springs & Level Valves

What years and models are these air springs and level valves compatible with?

Our air springs and level valves are designed specifically for International 9300 and 9370 models manufactured from 1987 through 2003. These parts are compatible with both single and tandem axle configurations. Always verify your truck's VIN and axle configuration before ordering, as some specialty configurations may require different part numbers. If you're unsure about compatibility, our customer service team can help verify the correct parts using your VIN number.

How difficult is it to install these air springs, and what tools do I need?

Installation typically takes 2-4 hours per axle for experienced mechanics and 4-6 hours for DIY installers. You'll need basic hand tools including wrenches (3/4", 7/8", and 1"), a floor jack, jack stands, and an air compressor to test the system. The most challenging part is usually removing the old air springs if they're corroded. We recommend having penetrating oil on hand and supporting the axle properly during installation. Many customers find it helpful to replace the mounting bolts at the same time, as the originals are often corroded.

What's the difference between OEM and aftermarket air springs for my International?

OEM air springs typically last 8-12 years and maintain exact ride height specifications. Our aftermarket options from Firestone and ContiTech offer comparable performance at 30-40% less cost, with most lasting 6-10 years under normal conditions. The main differences are in rubber compound formulation and manufacturing tolerances. Aftermarket springs may have a slightly firmer initial ride that softens after a few thousand miles. Both options maintain DOT certification and proper load ratings for your International 9300/9370.

How do I know if my level valve needs replacement versus just adjustment?

A level valve needs replacement if you notice air constantly leaking from the exhaust port, uneven ride height that won't adjust properly, or if the truck leans to one side when parked. Simple adjustment is needed if the ride height is consistent but too high or low. To test, manually operate the valve arm - it should move smoothly without binding and hold position. If it sticks, leaks, or won't maintain the set position, replacement is necessary. Most level valve issues on International 9300/9370 models stem from internal seal failure after 200,000-300,000 miles.

Can I replace just one air spring, or should I always replace them in pairs?

While you can technically replace just one air spring, we strongly recommend replacing them in pairs (both sides of the same axle). Mixing old and new air springs often results in uneven ride height, irregular tire wear, and potential handling issues. The cost difference is minimal when considering labor time, and paired replacement ensures balanced performance. If one spring has failed, the opposite side has endured the same conditions and mileage, making it likely to fail soon. This is especially important on International 9300/9370 trucks used for heavy hauling.