Just replace my valve cover gasket- cleaned up most of the oil buildup as possible- after running the motor with the new gasket- all leaks around the valve cover are gone! But i still seem to have oil seeping from my first cylinder header bolt/nut. It is the bolt/nut closest to the front of the motor. I was able to tighten the nut a bit but it still has oil seeping out. I suspect this has been happening for years since the oil buildup was very thick- what do you think is causing this leak?

 

Soory- I have a 2001 Tacoma with the 2.7l motor- 190,000 miles- still runs perfect!