My distributor is leaking inside. Can I just tear it down and replace the o rings inside, or do I need to replace the entire housing? If I can replace the o rings how many are there? I see one on the outside shaft how many more are inside?

Oh yeah, its a 95 Civix DX (D15b7)
Chris

 

There is 1 more o-ring behind the thrust washers. Usually the whole distributor will need replacement when an internal leak occurs.