Alright I feel really dumb asking this, but I need to. I just changed my valve cover gaskets on my car (second time). I still think that I am getting a little bit of oil leakage at higher rpms. My question is how tight can I tighten the valve cover bolts. I have the Fel-Pro Permatex/Permaseal (not sure which is the right name) valve cover gaskets and they have a steel insert in them. Thanks in advance.