Do spark plug tube leak oil?

So thursday I was prepping the car for the CMC show in Belvidere this weekend and I steam cleaned my engine( it amazes me what can be hidden under all of that 35 year old engine grime) The thing didn't look so bad but today I went out there because I smelled a bit of oil. I replaced the Valve cover gasket 2 weeks ago and I wanted to see if that was leaking again but the valve cover looks clean. I'm getting a bit of oil out of the #3 spark plug tube right above the distributor or at least that where I think is the begining of the leak. I'm 33 and have been a mechanic for 14 years but I didn't think that there was a gasket on the tubes. IS there a way to fix this leak?