This bulletin applies to 2014-2019 Chevy Corvettes equipped with a 6.2L LT1, LT4 or LT5 engine, regarding a concern of engine thermostat tick noise and/or running hot.
This bulletin applies to 2005-2008 Nissan Frontier models equipped with the QR25DE engine, and built before July 12, 2006. The issue may involve a ticking noise that sounds like spark knock, when accelerating 1/8 to 1/2 throttle opening.
This bulletin applies to 2014 BMW 328i xDrive vehicles. Some owners may complain about a high-frequency ticking noise from the engine bay.
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