Originally Posted by 92_88_royale
So just wondering...could this be the cause of my rough idleing as well? because when the car is on i can see the tensioner moving like crazy.
The harmonic balancer may be failing to damp vibration if it is really torn up. You must change the harmonic balancer in any case. Do that first, then see what you have. If the engine is running rough with the new balancer, look for vacuum leaks, bad plugs, wires and coils.