International ProStar Air Springs & Level Valves

Frequently Asked Questions About International ProStar Air Springs & Level Valves

What do air springs and level valves actually do on my International ProStar?

Air springs support the cab or suspension by cushioning it on a column of compressed air, while level valves automatically adjust the air pressure in those springs to keep the ride height consistent as loads shift or change. Together they help maintain a stable, controlled ride and reduce the wear and vibration that a solid mount or worn spring can transfer into the cab and chassis.

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 rough or bouncy ride, noticeable air leaks or hissing near the spring or valve, and the cab sitting noticeably higher or lower than normal after the truck sits overnight. If you hear the compressor cycling more often than usual, that can also point to a leak in the air spring or a valve that is not closing properly.

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

Fitment can vary by cab suspension type and model year, so it is important to check the specifications listed on each product page against your truck's VIN or existing part number before ordering. If you are unsure, having your VIN or the part number stamped on your current air spring or valve on hand will make it much easier to confirm a correct match.

Can I install a replacement air spring or level valve myself, or should I have a shop do it?

Many owner-operators and shop technicians handle these replacements with standard hand tools, a jack, and basic air system knowledge, but the job does involve working around a pressurized air system and supporting the cab safely while it is off the mount. If you are not comfortable relieving air pressure, supporting the cab, or adjusting linkage on a level valve, it is worth having a qualified diesel technician complete the installation.

How long should a replacement air spring or level valve last, and does it come with a warranty?

Service life depends heavily on road conditions, load cycles, and how well the surrounding suspension components are maintained, so we cannot promise an exact mileage or lifespan. Warranty terms differ by manufacturer and part, so check the specific product listing or reach out to our team for the warranty details tied to the exact air spring or level valve you are considering.