i have a 1993 bonneville SSEI supercharged and on the pass side of the motor the rattle is only at a idle i see the pulley jump and click when i press the gas so i kno wich one it is but im not sure if its the belt tensioner or idler pulley its at the bottom in the back towards the alt and plastic, i kno its not the harmonic balancer. and this must be a common problem does anyone kno wich one it is and maybe a link to the cheapest one rockauto was $49.99+ shipping, and the one thats on there is like year old from napa so there junk. thanks

ok i found out it is the belt tensioner pulley so i guess im just looking for the best price

I bought mine from www.partsamerica.com

When your tensioner pulley goes, it can be from being off balance, due to a bad tensioner. This happened to me and I almost learned the hard way, thankfully I was able to return the separate pulley I bought and buy the entire tensioner. Make sure that your tensioner is perfect before you go replacing just the pulley. Do a very close visual inspection, make sure the belt is not out of line at the tensioner.

Chadly, can you please put your year and trim level in your signature so we know what year the car is and what engine/options it has? Click on Profile at the top of the page and insert that into your signature. It'll help us help you.