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The transition from CFC-12 (R-12) to alternative refrigerants in mobile air-conditioning (AC) systems requires rigorous evaluation to ensure safety, performance, and compatibility. SAE J1657 provides a structured framework for assessing candidate retrofit refrigerants, covering essential criteria from toxicity and flammability…

The SAE J1658-2015 was a recommended practice addressing consistency criteria for alternate refrigerants in mobile air-conditioning systems. Originally issued in 1993 and revised in 1999, it was cancelled in January 2015. This article explains its purpose, cancellation reasons, and implications…

Electrostatic discharge (ESD) in fuel systems poses a serious safety risk. The SAE J1645 standard provides comprehensive recommended practices for minimizing electrostatic charge accumulation in automotive fuel systems and components. This article summarizes key recommendations, testing procedures, and common pitfalls…

For engineers designing and testing automatic transmissions, precise communication is critical. SAE J1646-2012, Glossary of Terms — Lubricated Friction Systems, provides a standardized vocabulary that eliminates ambiguity in specifications, test methods, and technical discussions. This recommended practice, stabilized by the…

The SAE J1647-2015 standard establishes test methods and requirements for evaluating plastic optical materials and coatings intended for use in high-intensity discharge (HID) forward lighting devices in motor vehicles. These materials are typically used for lenses and reflectors. The standard…

The SAE J164-2020 standard (formerly SAE J164 and including content from SAE J151) establishes dimensions and application guidelines for bayonet-type metallic radiator pressure caps and filler necks. It applies to passenger cars, trucks, marine, industrial, and similar applications. The primary…

In fluid power systems, the integrity of threaded metallic tube connections and stud ends is critical. SAE J1644 (cancelled in August 2007 and replaced by ISO 19879) provides a comprehensive set of test methods that remain widely referenced for the…

SAE J1637 is an industry-standard test method for evaluating the vibration damping performance of materials bonded to a steel bar. It is widely used in automotive, aerospace, and marine industries to rank order damping treatments for noise and vibration control.…

Stabilized Notice: SAE J1638-2015 has been declared stabilized by the SAE Non-Hydraulic Hose Committee. The underlying technology is mature and the document is no longer subjected to periodic reviews. Users are responsible for verifying referenced documents and continued suitability of…

SAE J1639-2017 provides a standardized classification and specification system for a limited set of polyamide (nylon) materials used in the automotive industry. Based on ASTM D4066, this recommended practice adds automotive-specific descriptive characteristics and property requirements. It is designed to…