+1 on the oil tube seals that are leaking. Some cars have valve cover gaskets with integrated seals, some come separate.Indeed--I sat down and did some head scratching and realized the spark plug tube must have a gasket at the bottom end as well as the top. Looks like both front and rear gasket kits will include the "Seal, Spark Plug" that look to be leaking (one tube is leaking on each bank, wha-who).
Now the question is whether I should just replace the valve cover gaskets or have my local mechanic adjust the valves in addition to the gaskets.
YES. This is definitely the most comprehensive video around right now. I just followed this video to a "T", and completed my whole valve cover gasket/plenum gasket/etc. last night. The main thing it lacks is torque settings, and I used his torque pattern sometimes, and sometimes the tech manual recommendations.This is an old thread but it's of interest to me. My wife's 2006 Odyssey has a recurring misfile on cylinder 3. This time when I pulled the coil out the boot was covered in oil. I guess that's killing it or the spark. I came here to search for a solution and this appears to be it. For anyone else, this appears to be a pretty comprehensive video with a few caveats.
It doesn't look extremely difficult and doesn't seem to require too many special tools so I'm going to give it a go myself. Thankfully there's plenty of mobile mechanics in my area..."just in case".