How To Check For Air Leaks In An Air Bag Suspension System (2024)

Adding air suspension to your car is one of many car enthusiasts' most sought-after aftermarket mods. The ability to adjust the ride height to your favorite height at the push of a button allows you to fine-tune your suspension for the perfect stance. Since this suspension setup relies on compressed air, you will need to make sure your air suspension kit is installed correctly and free of leaks for optimal operation. Today, we will look at a few symptoms of air leaks in your system and where they can be found.

How To Check For Air Leaks In An Air Bag Suspension System (1)

Symptoms Of A Leak In Your Air Suspension System

When your air suspension system develops a leak, it will be pretty noticeable as your kit will not perform as it should. Sagging suspension, poor performance, and longer air up times are all signs that your air suspension system is leaking. You may also hear a leak when your air suspension is aired up, and the air is escaping from one of your components. Look for these four symptoms from your air suspension kit to determine if you have an air leak.

Sagging Suspension

Sagging suspension on air-equipped vehicles is a tale-tale sign that you have an air leak in one of your air shocks or air springs. These shocks feature air-filled rubber bladders that can tear if exposed to sharp objects or extreme weather. Once these bladders develop a leak, your suspension will not air up on that specific corner as they will not be able to create the correct air pressure to raise the vehicle.

Poor Performance From Kit

If your air suspension is not performing as it should, you may leak somewhere in the system. Identifying where will determine on what is not performing up to standards. There may be a leak in one air strut if it is one corner. You may leak before or at the manifold if it is the whole kit. Poor performance can come from many different issues, so negating out an air leak can help you track down other problems in your system.

Taking Longer To Air Up

If you notice that your vehicle is taking longer to air up, this indicates that there is a problem with your air suspension. This could be from an electrical issue, a failing or malfunctioning compressor, a clogged air line, or simply an air leak before the manifold. An air leak that affects the whole system will most likely occur between the compressor and the manifold.

Strange Noises From Suspension Components

Strange noises coming from your air suspension kit can be due to a lack of air from an air leak. An air suspension air compressor and air strut exhaust valves should be the only thing you hear every time you use your air suspension. Any other noise that does not sound correct should be identified and remedied quickly before it causes more damage to your system.

What Causes Air Suspension To Leak?

A variety of different issues can cause air suspension leaks. The main culprit of a leaking air suspension system is damage sustained by one of the components. Most air leaks come from a damaged airline since they run in and out of the car and are exposed to the elements. While running these as close to the frame and body as possible will help keep them safe, they can still suffer damage from road grime and debris.

Other air leaks come from fittings not being correctly installed. Compressed air fittings must be fitted using the correct thread tape and sealants to prevent leaks at the joints. This is where having an experienced air suspension professional complete the install pays off. Once you get your air suspension installed, the last thing you want is an air leak that you have to track down.

Where Can Air Leaks Be Found In An Air System?

Air leaks can be found anytime that air is stored or transported in your air suspension system. This makes tracking down air leaks difficult if you can't narrow them down quickly. Let's break down where the most common air leaks can be found and how you can test for leaks.

Air Struts/Air Bags

Air struts or airbags are a common area for air leaks both in your front end suspension and rear suspension. The rubber bladder can deteriorate over time if exposed to extreme temperatures and road grime. Keeping your air struts clean and free of contact from other components can help ensure that your rubber bladders last as long as possible. To detect an air leak on an air strut, inflate the bag and spray the bag with soapy water in a spray bottle. If you see a bubble forming from the liquid, your airbag most likely has a tiny hole causing a small leak. To fix a leaking air strut, you will need to replace the entire assembly as these cannot be patched.

Air Lines

Air lines are the most common leaking component on a malfunctioning air ride suspension system. Air lines, in most cases, are run from the trunk or truck bed to each corner of the suspension. This means they can run both inside and outside the vehicle, getting exposed to elements and road grime. This can cause tears, holes, and deterioration over time, leading to air leaks. Mounting your air lines as close to the frame and body as possible can help to prevent your air lines from being damaged by road debris. You can use the same soapy water test on air lines that you would on your air struts. To fix a hole in an air line, you can replace the section of airline with a replacement line for a secure fix.

Air Tank/Valve Manifold/Compressor

Most leakage can be narrowed down to the connection points for the rest of your components, such as your air tank, valve manifold, solenoids/check valve, and air compressor. Leaky fittings are usually caused by poor installation or deterioration of the thread taped used on the fittings. This can be a relatively easy fix as you can untread the fitting, put new thread sealant on, and reinstall to fix the leak. A leaking valve manifold or compressorleaking from any other place than the fitting or connector should be inspected, removed, and replaced for proper operation.

High-Quality Air Suspension Components From AccuAir

The best way to prevent air leaks in an airbag suspension system is to use high-quality products from AccuAir. AccuAir offers a complete line of air suspension parts that pass our highest-quality standards to give you the best products in the industry with a warranty to match. Get everything you need at our site and if you need help with your air suspension system, give us a call or fill out our online form, and an air suspension expert will be glad to help you.

How To Check For Air Leaks In An Air Bag Suspension System (2024)

FAQs

How To Check For Air Leaks In An Air Bag Suspension System? ›

To detect an air leak on an air strut, inflate the bag and spray the bag with soapy water in a spray bottle. If you see a bubble forming from the liquid, your airbag most likely has a tiny hole causing a small leak. To fix a leaking air strut, you will need to replace the entire assembly as these cannot be patched.

What is the best way to test for air leaks? ›

Light an incense stick and carefully pass it around the edges of common leak sites. Wherever the smoke wavers or is sucked out of or blown into the room, there's a draft. You can also use a damp hand to locate leaks; any drafts will feel cool to your hand.

Is there a way to check airbags? ›

Check the Airbag Indicator Light

The airbag indicator light can clue you in on airbag system trouble. Turn the ignition key to the first position, and pause there. This is the indicator light test position. You should see all the indicator lights turn on, including the airbag light.

How do you diagnose air suspension problems? ›

If the vehicle sags at one corner or side, the easiest way to diagnose the air suspension problem is to put the vehicle on a lift and do a visual inspection of the air struts and springs, the ride height sensors, air lines and connections and the compressor (Figure 5).

What tool is used to find air leaks? ›

Use an air leak detector

There are two main types: thermal leak detectors and ultrasonic leak detectors. Thermal leak detectors work by detecting temperature differences in the air. Ultrasonic leak detectors work by detecting sound waves that are produced by air leaks.

What is the formula for air leakage test? ›

The formula used to determine the extent of compressed air leaks at a facility is: Leakage (%) = (T x 100) ÷ (T + t) T = onload time (minutes), t = offload time (minutes).

What pressure should my airbag suspension be? ›

At light weights, we've had a minimal 15PSI in each airbag, and when we were fully loaded during our most recent trip 25PSI seemed to have our Cruiser sitting level. The maximum recommended pressure is 50PSI, so it's nice to be achieving great results at moderate pressures.

How often do suspension airbags need to be replaced? ›

Air Struts/Air Bags - 80,000-100,000 Miles

Air springs normally last 80,000 to 100,000 miles. Over this time, the rubber bladder dries out, and cracks appear around the bottom piston.

How to find a leak in air bag suspension? ›

The easiest way to tackle this is to get a spray bottle of soapy water and spray every fitting or connection to your air tank. If air bubbles start to form on the area that you sprayed, then you have successfully hunted down your leak and know which component needs to be fixed.

How do you diagnose an airbag system? ›

Airbag Diagnostic Tests

The test checks to see if all the sensors and circuits of the airbag are functioning. If the system detects any problems, it gives you a signal through the airbag indicator by flashing the light several times, giving you the specific problem the test has detected.

How can I test my suspension at home? ›

An easy check is the bounce test. Simply push your entire weight down on your car's bonnet. Release and count the number of times the car bounces. If it bounces more than three times, then there is a problem with your shock absorbers or struts.

How do you find a suction side air leak? ›

Test for Suction Side Air Leaks
  1. Pour small amount or larger dollop of dish soap into a cup.
  2. Fill the cup three-quarters of the way full with water.
  3. Agitate water to create a good amount of foamy bubbles.
  4. With the pump running, scoop out foam from the cup and hold it to any area suspected plumbing leaks.
Jul 14, 2020

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