When I finished painting my valve cover I used the same gasket because when they rebuilt the motor they put all the gaskets new so it was good but I dont know if I moved or disconnected a vacuum hose when I took the filter housing out because a hose is sucking air with nothing connected to it? And also is it bad that I didnt put silicone I drove it and no oil or air come from the valve cover it just lost some power what can it be?