This has been a saga that has lasted since our last Engine Overhaul 3 years/700 hours ago. Turbo Controller leaks a fair amount of oil near where it attaches to mounting bracket in board. We have gone through 3 different controllers and a few overhauls of the controller, yet the leak is still there. I don't know if our A&P might be doing something wrong during the install? He is very experienced with Bonanza's and Turbo Systems, so I do have a lot of trust in his skills, knowledge and experience. The most recent controller is a Factory Remanufactured unit from Hartzell since they bought the STC to do that. My A&P is suggesting that the quality of these overhauled units is just low and that is it, but I am thinking there must be something else we can look at.
Any advice would be greatly appreciated.