My bearings started making noise around 110K miles. I just replaced all four of them. Kinda dumb the tensioner is one assembly but probably good to replace it anyway at this point. I already replaced the belt previously when I did the gallery gaskets.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |