Review on ACDelco 12563084 Original Equipment Tensioner by Billy Berry

Not really a review, I just installed it yesterday 26th October just FYI. If you are replacing an aftermarket idler, you will need a shorter bolt. If you use the same bolt, there is a risk of damaging the timing cover if you try to secure the tensioner by unscrewing the bolt all the way. The correct screw is an M10 x 1.50 x 50mm shoulder screw, $3.39 at your local ACE store. I wouldn't recommend using a stack of washers unless necessary.