The oil scavenge pipe going from the dry sump pan to the oil pump appears to be held in by just the tension of two rubber O-rings, no snap ring, or circlip. There is not a groove for either cut into opening for the pipe. Is this correct? I realize this is not under pressure, but I'm worried that my pump may be sucking air. The oil pump has a similar two O-ring confirguration, however, it is at least secured by an interior snap ring. Thanks.........