Ok got my new motor installed, fired right up but I am getting a bad leak from the bottom hard line oil fitting where it meets the motor. There is only one bolt and no gasket that I have ever seen. Why is this leaking? I was thinking maybe I replaced it with the wrong bolt? I have a black 8mm hex head in there now and it seems to fit perfect, I cant think of anything else causing this to leak all of a sudden. Ideas?