850 bumpin and knocking, but where is the noise comming from

Gabewillwin · Post by **Gabewillwin** » 18 Jun 2005, 17:57

i have a 1997 850 and recently the car has been making a kinda bump knock sounds comming from what seems to be the front pass side wheel well. All the brake components are new and nothing seems loose, but i know how sound carries under a car. The noise happens mostly when the car is being aggitated (a bump or a dip) but on occasion happens under normal driving conditions. Any one have any ideas...the sound is driving me nuts!.

Gabewillwin · Post by **Gabewillwin** » 18 Jun 2005, 17:59

i should mention that the car has 153 K on it and has the origional auto in it..and is in preatty good shape.

White850Turbo · Post by **White850Turbo** » 19 Jun 2005, 04:52

Sounds like a broken spring seat to me since you said it mainly happens when driving over bumps/dips. https://www.matthewsvolvosite.com/spring_seats.php <-- This page shows what happens.

Tsquared · Post by **Tsquared** » 19 Jun 2005, 05:03

Gabewillwin wrote:i have a 1997 850 and recently the car has been making a kinda bump knock sounds comming from what seems to be the front pass side wheel well. All the brake components are new and nothing seems loose, but i know how sound carries under a car. The noise happens mostly when the car is being aggitated (a bump or a dip) but on occasion happens under normal driving conditions. Any one have any ideas...the sound is driving me nuts!.

The spring pad on the McPhearson strut could be worn out or torn loose. I had the rear lateral sway bar break on my 850 at 65K - the knocking it was making sounding like front suspention.

Get it on a platform lift so that the suspention is compressed and you can inspect it from the bottom.

Let us know what you find out.

TT

Gabewillwin · Post by **Gabewillwin** » 20 Jun 2005, 14:24

Thanks guys, post vacation (leaving tommorw!!) ill put it on a lift and see what is to blame..both explainations seem totally on par, only time will tell