Cadillac Turbo Rattles When Cold
This bulletin applies to 2014-2016 Cadillac CTS-V Sport and XTS vehicles equipped with the LF3 twin-turbocharged engine.
The vehicle may exhibit a rattle from the turbocharger when cold. This will be a cold start noise at idle, not to be confused with the noise when revving the engine. If you have verified that the rattle noise when cold is from the turbocharger and the noise is unforced, there is a revised part available for this concern.
The new part has a revised spring for the wastegate to limit movement when cold. The new P/Ns are 12666538 (LH) and 12666538 (RH) for CTS-V Sport and 12666540 (RH/LH) for the XTS.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.