okay so you know the back of the tensioner, the side without the nuts? Its not a socket cap, its a flat head, and its stripped. Can I use reverse drillbit to get it out and put a wrench on the nut possibly?
Here are those long awaited photos, finally got my Allen key set back. It's real nasty in there I'll give it that. But the noise it was making was like it was about to lock, kind of like the engine was off center and it was gonna pop off, which it isn't.