There are numerous applications for helium, automatic leak test systems (ALTs) in the automotive components assembly process. These applications presently include the leak testing of: tire rims, condensers, heat exchangers, evaporators, transmissions, braking systems, fuel tank systems, torque converters, air bag inflators, catalytic converters, compressors, shocks, oil pans and muffler/silencers. There is a large range of automotive components and sub-assemblies that require leak testing.
Historically, leak testing methods for these components have included: water immersion, compressed air and halogen leak testing. A current solution to high volume component/part leak testing is automatic leak test systems that use helium and a helium leak detector. By using this type of system, human error and environmental issues can be eliminated. ALT systems are highly accurate and reliable. ALT systems are currently available in a wide variety of sizes and chamber configurations, and can operate in three different modes. Examples of these different types are shown throughout this article.