Frequently Asked Questions About International LoneStar Air Springs & Level Valves

What are the signs that my International LoneStar air springs need replacement?

Common indicators include uneven ride height between sides of your truck, excessive bouncing or harsh ride quality, visible air leaks around the springs, or your truck sitting lower than normal when parked. You may also notice increased tire wear on one side or difficulty maintaining proper ride height even after adjusting the level valves. Most air springs last 100,000-200,000 miles under normal conditions, but harsh environments and heavy loads can reduce lifespan.

Are aftermarket air springs compatible with my International LoneStar, or should I stick with OEM parts?

Quality aftermarket air springs from reputable manufacturers like Firestone, ContiTech, and Goodyear are fully compatible with International LoneStar trucks from 2008-2020 model years. These aftermarket options often match or exceed OEM specifications while costing 30-50% less. Key compatibility factors include matching the correct style number (typically 1R11-221 for front and W01-358-9622 for rear), ensuring proper height specifications, and verifying the top and bottom plate configurations match your truck.

Can I replace air springs myself, or do I need special tools and equipment?

Air spring replacement can be done by experienced DIY mechanics with proper safety equipment. You'll need heavy-duty jack stands rated for commercial trucks, basic hand tools, and ideally an air compressor to test the system. The job typically takes 2-3 hours per spring. Critical safety steps include properly supporting the frame, safely releasing air pressure before removal, and ensuring proper torque specifications (typically 35-45 ft-lbs for mounting bolts). Many drivers find it safer and more efficient to have a qualified truck mechanic handle the installation.

How do I know if my level valve needs adjustment or replacement versus just the air springs?

Level valves control ride height by regulating air flow to the springs. If your truck maintains proper height when stationary but drops or rises while driving, the level valve likely needs adjustment. A stuck or failing level valve may cause one side to sit higher or lower, or the truck may continuously try to level itself. To test, manually operate the valve arm - it should move smoothly and return to center. If the valve is leaking air, shows corrosion, or doesn't respond to manual operation, replacement is necessary. Adjustment typically involves setting the valve linkage to achieve proper ride height per International's specifications.

What's the difference between standard and heavy-duty air springs for my LoneStar?

Heavy-duty air springs feature reinforced rubber compounds and additional fabric plies to handle higher pressures and heavier loads. Standard springs typically support up to 100 PSI and are suitable for general freight hauling, while heavy-duty versions can handle 120-150 PSI for consistently heavy loads or severe service applications. Heavy-duty options cost about 20-30% more but can last significantly longer under demanding conditions. Consider heavy-duty springs if you regularly haul maximum legal weights, operate in extreme temperatures, or drive on rough roads frequently.