oil leak behind distributor

Sooo... I have a 92 Prelude Si. About a year ago I replaced the entire distributor, not just the cap the entire thing. About 2 days ago it started leaking oil like crazy. It only leaks when the car is running so im thinking it has something to do with the oil pressure. I found where the leak is and its behind the distributor. It might be the o-ring, or the useless honda service man said it might have something to do with the cam sensor. Which doesnt make much sense to me. If anybody has had this problem before or has any idea what im talkin about. i would love the help. Thanks