Thread: Supercharger coupling OR Supercharger belt tensioner?

Just replaced the tensioner for the supercharger belt and it's still got the noise so I guess I just wasted $80 and half a day to fix nothing...

I tried to take a video on my phone but the sound is pretty crappy.

Oh, and I did check it with and without the supercharger belt on.

When it's on (like in the video) it makes the noise pretty constant while at idle, but go anywhere above idle and it goes away. Then once you turn the key off it makes a couple clunk noises once the motor comes to a stop.

With the supercharger belt OFF the car the noise is gone completely except again when I turn the key off, it makes one small clunk when the motor comes to a stop, as opposed to a few clunks with the belt on.

cracked flexplate?

Originally Posted by kfish

cracked flexplate?

Searched some and it sounds like a possibility, but why would it go away once I pull the supercharger belt off? Seems like it'd do it constantly.

Turned out to be a worn out harmonic balancer. The rubber had cracked and was causing the rattling noise. Thanks to Morad for hooking me up with a replacement.