International DuraStar Air Springs & Level Valves

Frequently Asked Questions About International DuraStar Air Springs & Level Valves

What do air springs and level valves actually do on my DuraStar?

Air springs (also called air bags) support the weight of the cab or suspension and absorb road shock, while the level valve automatically adjusts air pressure in the springs to keep the truck riding at the correct height as load and road conditions change. Together they help maintain a stable, level ride and reduce stress on the frame and suspension components.

How do I know if my air spring or level valve is failing?

Common signs include a cab or axle that sags on one side, a rougher or bouncier ride than normal, visible cracking or bulging on the rubber air spring, audible air leaks near the valve or bellows, or the truck slowly settling overnight due to air loss. If you notice uneven ride height that does not correct itself after the engine has been running for a few minutes, the level valve linkage or valve itself may need inspection.

Will these air springs and level valves fit my specific DuraStar model and year?

Fitment can vary by DuraStar model year, cab suspension type, and whether the truck has a front air ride cab or rear axle air suspension. Always check the part number and specifications listed on the product page against your truck's existing component or your VIN/build sheet before ordering, since even trucks in the same model line can have different suspension configurations.

Do I need to replace the level valve linkage or arm when installing a new valve?

In many cases the original linkage and mounting arm can be reused if they are not bent, worn, or corroded, but it is worth inspecting them closely during installation. A worn linkage pivot or a bent arm can throw off the valve's calibration even if the new valve itself is functioning correctly, so replacing worn linkage hardware at the same time is a good practice.

Can I install an air spring or level valve myself, or should a professional handle it?

Many owner-operators and shop technicians replace these parts themselves, since the job typically involves releasing air pressure from the system, unbolting the old component, and mounting the new one in its place. That said, work on air suspension systems involves pressurized air and components that support vehicle weight, so if you are not comfortable working around live air systems or are unsure about proper torque and alignment, having a qualified technician handle the installation is a safer choice.