turbos and got to this bolt with a special cut down open end wrench. Give him a call and see if he can give you some direction so you don't have to take the engine out. Obviously you have to remove a bunch of crap from underneath the car to get at it, but it's way better than taking out the engine again. I don't see how this would make you run rich though, as the leak is exhaust gas and not metered air. His name is Joe Porcelli and he owns a Z shop in L.A. called OperationZ. His phone # is 818 886-8040. At least see if I remember correctly, and I'm sure he'd be more than happy to give you some direction. Good luck, Mark