[san rensho]

As radium said, be sure its the cam covers that are leaking. If it is the cam covers, then buy the new micro encapsulated cam cover bolts and replace all the bolts along the bottom of the cam covers, I believe its 3-4 per side. Take them out one at a time and goober the bolt with gasket maker (permatex red or equivalent) from the middle of the bolt to the head. More is more. Then re-install them and torque them to spec, do not overtorque.

I had a cam cover leak that dripped enough oil onto the exhaust that it smoked. After doing the above, it just barely weeps oil occasionally. Not perfect, but much cheaper than taking off and re-sealing the cam covers.