TSBs

New Subaru Tumble Valve

Sept. 20, 2021

Subaru has redesigned its TGV (tumble generator valve) assemblies in the manifold assembly/intake control system for 2014-2018 Forester Turbo and 2015-2019 WRX vehicles.

Information courtesy of Mitchell 1

Mike Mavrigian

Subaru has redesigned its TGV (tumble generator valve) assemblies in the manifold assembly/intake control system for 2014-2018 Forester Turbo and 2015-2019 WRX vehicles.

Condensation resulting from the EGR system operation may enter the area between the TGV shaft and bearing. Corrosion can develop and impede the movement of the TGV shaft and cause DTC P2004, P2005, P2006 and/or P2007 to set. The material of the TGV shaft has been changed to stainless steel to optimize corrosion resistance. The right side intake control P/N is 14111AA041; the left side is P/N 14111AA051.

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.

About the Author

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.