brake noise

jantt · Post by **jantt** » 18 Jun 2019, 11:32

Hi

Have a C70 2000
6 weeks ago my front brakes starts to sqeeks/scream

Have changed discs and pads twice and hoses and lubicated gliders.All original parts
Have cut edges of pads and tried scream plates
Have removed anchor plates

Changed to 16" discs and retainer from 15" last year

Noise comes when brake soft

Will change back to 15" help ?

Can not find cause

Please help

Post by **scot850** » 18 Jun 2019, 22:04

Just to confirm you have use Volvo original parts? Did you change from 15" to 16" rims last year? Or did you change the diameter of the rotors from 280mm to 302mm?

Neil.

Post by **MoVolvos** » 18 Jun 2019, 23:41

jantt wrote: ↑18 Jun 2019, 11:32
Noise comes when brake soft

The pads likely have not been fully bedded. Some companies want you to get them done immediately after installation while others after 500 or so miles. It's the air gap. Mine still squawk like the video while pulling into the driveway but it is very slight now as it approaches 500 miles. Almost time for the bedding process according to EBC Brakes. It is that loud. Check your manufacturer for instructions.

E92 m3 vs Volvo 850 Nürburgring - Embedded Video Link Not Working? Use Link.
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jantt · Post by **jantt** » 19 Jun 2019, 00:09

original parts and yes changed rotor from 280 to 302

Yes my brakes sounds like that

Have changed before and also on my former 850
Never have I had to do anything after mounting

jantt · Post by **jantt** » 19 Jun 2019, 00:31

Work in a car Company and we never bed brakes

Post by **MoVolvos** » 19 Jun 2019, 01:13

jantt wrote: ↑19 Jun 2019, 00:31 Work in a car Company and we never bed brakes

When I was in China 1985 I saw some guy driving up and down the street and braking hard quite a few times (no clue). Worked at Pepboys & Acura in the mid 90's and did not recall bedding brakes either. I think I started to about 6 years ago after purchasing a set of Front Powerstops for a 2003 Lexus GS300 because they say it's a must. The brakes are still on the car. Check the Manufacturer for recommendations.

jantt · Post by **jantt** » 19 Jun 2019, 01:18

actully I work at a Volvo company and we never bed brakes
When i mounted the 16" brakes last I didn`t do it
Same pads as last year, so don`t understand why I have to do it now

Post by **MoVolvos** » 19 Jun 2019, 01:24

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Check the run out on the rotor or make sure all the surfaces of the rotor and wheel are clean. The air gap of pad and rotor during light braking is not completely closed. Check for debris in the pads also.

Post by **MoVolvos** » 19 Jun 2019, 01:28

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Reading your OP you may have a caliper that is sticking slightly. Regardless something is causing the air gap. Can you tell if it is from one side only or both sides?

jantt · Post by **jantt** » 19 Jun 2019, 01:39

All is cleaned and fine
Have cleaned and greased it 4 times
Have tried with 3 pads
Yesterday afternoon I cleaned all and mounted new pads. Drove 2 km and noise came
Must try to drive some km and see if it stops

Have thinked that it could be the calipere, but workshop says no.

Will try to spin wheels today