My question is about the right rear plug. What a freaking nightmare...I was very slow when trying to sit and rethread the new plug. I couldn't really get it started with a hose attached to the top of the plug but after dropping it down in there a few times I got it started with the deep socket attached to the plug. I spent a good 1/2 hr. turning it from slightly different angles thinking it should thread loosely for most of the way in but after a few threads there was resistance. I finally committed and wrenched the socket until it stopped then gave it another quarter turn. I did not torque it. It started and is running smooth. Would I know if it wasn't seated properly and I cross threaded it? If it wasn't seated properly would there be evidence of this in the way it ran? Paranoid!