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Small amount of oil in spark plug well

3K views 14 replies 7 participants last post by  Jim O. 
I'm changing my spark plugs due to a misfire, and noticed a some oil in the spark plugs well. The ignition coil itself looks alright, but was loose when I went to pull it. My first thought is that the spark plug was loose and allowed a bit of blowby. Any thoughts? View attachment 955357
When you removed the spark plug, was it loose or not?
 
Yeah, I'd say it was more loose than the other ones. It was still threaded in there (I think), but it didn't require as much torque (if any) to break it free. Also, I'm not sure if this is just me being stupid, but when I was trying to screw the plug in, it wasn't going all that easily. I tightened it down by hand, but when i went in with the torque wrench it felt like it wasn't giving much resistance at all. After I took it out again it looked like it didn't thread in all the way. Might've just been gunk in the threads, but idk. I went in a second time just hand tightening and it got deeper with a normal amount of resistance, but I let off before it was tight because I got scared that the threads might be damaged. I didn't try a third time because it got dark out while I was investigating what might've caused the oil or whatever that is to get in there in the first place.
I would investigate whether your valve cover gasket is leaking.
 
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