# 91 Buick Park Ave **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [September 11, 2008, 9:23pm UTC](https://community.cartalk.com/t/91-buick-park-ave/19461 "2008-09-11T21:23:16Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![fekete](https://avatars.discourse-cdn.com/v4/letter/f/e9c0ed/32.png) [@fekete](https://community.cartalk.com/u/fekete)\ **Post date:** [September 11, 2008, 9:23pm UTC](https://community.cartalk.com/t/91-buick-park-ave/19461/1 "2008-09-11T21:23:16Z")
Developed a mechanical scraping noise. If you take the drive belt off the noise is not there. So I replaced the power steering pump, alternator, water pump and AC compr. I am now thinking it is the crankshaft balancer assembly. ANY SUGGESTION OR HISTORY? Thanks ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [September 11, 2008, 10:51pm UTC](https://community.cartalk.com/t/91-buick-park-ave/19461/2 "2008-09-11T22:51:24Z")
This kind of thing is usually caused by a bad bearing in the idler pully, the least expensive thing to replace. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [September 12, 2008, 2:16am UTC](https://community.cartalk.com/t/91-buick-park-ave/19461/3 "2008-09-12T02:16:39Z")
Yeah about $20. The balancer can go south due to the rubber coming apart and 'spose it could scrape on the crank sensor. You’d think there would be some drivability problems though with that. ---
**Author:** ![researcher](https://avatars.discourse-cdn.com/v4/letter/r/edb3f5/32.png) [@researcher](https://community.cartalk.com/u/researcher)\ **Post date:** [September 12, 2008, 5:22pm UTC](https://community.cartalk.com/t/91-buick-park-ave/19461/4 "2008-09-12T17:22:42Z")
Idler pulley =\> tensioner pully