ST165 Pinging/rattle at ~2000 rpm

[MatPop86]

I've noticed my All Trac has started making a rattling noise, like metal on metal contact at 2000 rpm near the front right of the car. I've heard the idler tensioner makes a noise like that when it goes bad, but I've done all the tensioners when I had the engine out, and made sure the heat shields are tight along with the intercooler piping (Swapped to FMIC). Any help or ideas pointing me in the right direction would be appreciated