Honda Repair: Distributor O-ring, oil leaks, oring

Question
I have an 1991 Accord LX, and the dealer says I need a o-ring installed on the distributor stop an oil leak. Being a do-it-yourselfer, I would like to do this myself. How would I go about doing this?

Answer
Get the oring and remove the distributor by removing the 3 bolts that hold it on and replace the oring.  Not hard.  This may only be part of that oil leak.  I have seen more oil leaks through the distributor instead of around the outside oring.  You can start by replacing the oring but I bet you have to replace the entire distributor assembly.