Thanks, q. I'll follow this one to the letter and see what happens.

I definitely recall having backed off the tensioner bolt more than half a turn. Probably two full turns. Half a turn very much felt as though the tensioner was still tightly held and unable to move on its mount.

And when I first read through the instruction sequence above, on the last one, I thought that Helms was saying to torque the *tensioner* bolt to 177 Nm. Holy cow! Fortunately, I caught my error on a second, closer reading.