when you are done and you tighten the valve cover bolts back down BE CAREFUL because they strip out VERY easily. if you dont know what 9 ft/lbs feels like then here's what i advise you to do. Get a 10mm deep socket *so you can reach the bolts under the plug cover* and a 3/8s extension. hand tighten every bolt as much as you can using just the extension NO RATCHET YET! When you cant get them any tighter put the ratchet on and grab it with your palm over the extension so you use the minimal amount of leverage. Tighten em a tiny bit more. usually as much as you can tighten by using just ur wrist for twist. Even that can snap a bolt depending on how strong your wrist is lol. And you dont wanna snap one of those cause they are not cheap. I hope that this helped you.