Originally Posted by AleXtz
Here... the screw where oil is comming out is just under the spark plug cable, see if you can take a look
You can be easily fooled on where it is exactly leaking. I had the same leak up around there and I thought first it the camshaft plug, then the front valve cap seal, then rear valve cap seal, so I just replaced all 3 seals. I still don't totally know which one it was.
Buy #16 (comes with both front and rear seals) and #17 (cam plug).
If this doesn't fix it it may be the valve cover gasket.