What mark should the drive belt tensioner be on when you install a new belt?

 

If you are talking about the drive belt tensioner, there is no specific mark that I know about. On the timing belt tensioner, just make sure your cams are dead on their marks and the crank pulley lined up on the "0" mark. This should have been before you unistalled everything.

 

Ya theres marks on the drive belt tensioner...thanks for the info on the timing belt but I need info on the drive belt tensioner

 

there are like 2 lines on it, you should be between the 2 lines. if you are past the last line then the spring is too weak and will rattle soon.