So i have a 2011 wrx and I recently got a clutch change. When i got it back I drove it and got the tires changed but as i was leaving my house a bolt flew out and we have yet to determine where it came from. It has a chance to be from the turbo and is causing the leak. When I frive it around my neighbor hood it makes an awful gasket leak sound and wont build boost. What are some possibilities?