Need any info why a new belt tensioner will rattle with the a/c on? I have a new belt with a 15% pulley installed . Also have a tensioner stop bracket.

 

Where'd you get the new tensioner? I have a rattle as well but not sure exactly where it is coming from. Could be from the gates tensioner replaced about 6mo to a year ago. My idle sucks though.

 

I have a new Gates brand tensioner installed. I also have a Alta 15 percent pulley along with the tensioner stop bracket. After looking into it, I found that the metal tab inside the spring on the tensioner was making the rattle along with the tensioner bracket. I bent the top of the metal tab slightly over and had to bend the tensioner stop bracket also. The rattle stopped on the tensioner.....but the tensioner stop bracket has a slight rattle....you can't hear it with the hood closed. It's a lot better now.....compared to before when it sounded like something was about to break off. I read about the gates tensioner making the same noise and they said it was the same metal tab as mentioned above. Hope this helps....

 

Heh, we have almost identical setups (15% pulley), will try it thanks!