I recently replaced the belt on my '99. When I swapped the belt the tensioner did feel like it had much "spring" left to it. Sure enough, I've heard some belt squeal on start up recently and if I turn the tensioner in the direction to remove the belt, it doesn't spring back to its postioner to tension the belt. Is there any maintenance of this item (ie does it need oiling or greasing?), or do I need to replace it?