I was experiencing an oil leak on my left turbocharger between the bearing cartridge and the exhaust turbine. It would only leak while the engine was running. I had the turbocharger rebuilt by an excellent turbocharger repair shop in Ocala, Florida - Evergreen Turbo. (I highly recommend them.) It continued to leak. I plugged the scavenge tank vent line and the leaking stopped. Can anyone explain this? Does anyone know if plugging the vent line could cause other problems?

 

Don't know that the 'scavenge tank vent line' is, doesn't sound like a good idea though. Can you post a pic of what you plugged?