joeluth Posted May 27, 2022 Report Share Posted May 27, 2022 Last autumn I replaced the discs and pads all round. I used these Textar pads https://www.ebay.co.uk/itm/303432925623 and these Zimmerman discs https://www.heritagepartscentre.com/uk/98635140105-brake-discs-front-pair.html and the equivalent items for the rear. The problem: They are making quite a loud brushy kinda "Shhh" sound when I brake! seems like its coming from all 4 corners too, it may have been like this all winter and I only just noticed recently with the top down. Thinking perhaps the pads aren't really a good match for the discs? or maybe I didn't bed them in properly and they are messed up somehow. Anyone experienced this, or have any suggestions / reccomendations? Thanks! Quote Link to comment Share on other sites More sharing options...
charlieboy2608 Posted May 27, 2022 Report Share Posted May 27, 2022 Hi. Does this occur every time you brake? For example when stopping at traffic lights or under harsh braking? Can the noise be heard if you lightly push on the pedal? Quote Link to comment Share on other sites More sharing options...
Daboy3000 Posted May 27, 2022 Report Share Posted May 27, 2022 Not just rubbing the rust off? Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 27, 2022 Author Report Share Posted May 27, 2022 (edited) 19 minutes ago, charlieboy2608 said: Hi. Does this occur every time you brake? For example when stopping at traffic lights or under harsh braking? Can the noise be heard if you lightly push on the pedal? Yeah it's all the time, regardless of how hard I hit the brakes, emergency stop or just slowing down a touch, for a speedbump for example. It's just weird. Can anyone even hear their brakes usually? I can't think of a time when I've noticed them prior to this! Edited May 27, 2022 by joeluth Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 27, 2022 Author Report Share Posted May 27, 2022 (edited) 8 minutes ago, Daboy3000 said: Not just rubbing the rust off? no I don't think that's it. I haven't noticed any rust. but now that you mention it, these Zimmerman discs supposedly have some kind of anti corrosion coating on them.. perhaps it's had a bad reaction with the pads or got stuck onto them. Edited May 27, 2022 by joeluth Quote Link to comment Share on other sites More sharing options...
gillbe Posted May 27, 2022 Report Share Posted May 27, 2022 This thread https://www.m5board.com/threads/loud-braking-noise-after-replacement.582034/ ends in success - suggests get them hotter and redo your bedding process (..bedding procedure was 15 stops from 60 to 30mph) 1 Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 27, 2022 Author Report Share Posted May 27, 2022 10 minutes ago, gillbe said: This thread https://www.m5board.com/threads/loud-braking-noise-after-replacement.582034/ ends in success - suggests get them hotter and redo your bedding process (..bedding procedure was 15 stops from 60 to 30mph) worth a shot, thanks! 23 minutes ago, Daboy3000 said: Not just rubbing the rust off? no I don't think that's it. I don't see any rust. Quote Link to comment Share on other sites More sharing options...
Pordave Posted May 27, 2022 Report Share Posted May 27, 2022 Are you sure it’s not the backplates rubbing? I got a set of Brembo rear discs and pads and had a constant sound. I went back to the garage who fitted them and he said the groove in the Brembo disc wasn’t as deep as the OE discs. After 100 miles it stopped rubbing. It basically rubbed away the backplate by a few thou. Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 27, 2022 Author Report Share Posted May 27, 2022 26 minutes ago, Pordave said: Are you sure it’s not the backplates rubbing? I got a set of Brembo rear discs and pads and had a constant sound. I went back to the garage who fitted them and he said the groove in the Brembo disc wasn’t as deep as the OE discs. After 100 miles it stopped rubbing. It basically rubbed away the backplate by a few thou. thanks mate, hmmm yeah pretty sure, I mean I'm not ruling anything out but it's not a constant sound, it's just when I brake, and these discs and pads have done about 500 miles now. Quote Link to comment Share on other sites More sharing options...
edc Posted May 27, 2022 Report Share Posted May 27, 2022 If the sound only occurs when you hit the middle pedal then surely it's just the sound of the pad on disc. I'd you had drilled discs before maybe the holes were partially blocked. You get less of the cheese grater effect then and also as the discs wears the hole edges wear a fraction. Quote Link to comment Share on other sites More sharing options...
GmanB Posted May 28, 2022 Report Share Posted May 28, 2022 Had to do a second round of bedding on discs/pads a couple of years ago, pretty horrible sounds with a bit of juddering under braking. Worth a try? Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 28, 2022 Author Report Share Posted May 28, 2022 1 hour ago, GmanB said: Had to do a second round of bedding on discs/pads a couple of years ago, pretty horrible sounds with a bit of juddering under braking. Worth a try? Yeah 100% worth it, they feel dull and far too noisy at the moment, hopefully I'll find time this weekend, thanks all for your suggestions! Quote Link to comment Share on other sites More sharing options...
joeluth Posted May 28, 2022 Author Report Share Posted May 28, 2022 Took the boxster out: Did 5 x 60 to 20mph braking sessions drove for a few miles to let the air get to them and then repeated. Completely got rid of the brushing noise and the brakes felt way better, bitey and quiet. Result! However: Something bad happened on the way home. Started to get a wobble through the steering wheel. went to brake, foot went to the floor, nothing! Pumped the brakes a few times and got some weak stopping power back, I assumed I'd burst a brake pipe. very very carefully got the car home, parked up and had a look. Passenger side front wheel - smoking hot compared to the others, with a noticeable smudge on the brake disc. Hopped back in and without starting the car I just pressed on the brake again and it went to the floor, pumped it a few times and it felt rock solid. Started the car up again and moved it back and forth a bit on the driveway, brakes felt great, really bitey again. I'm not sure what to make of it, burst pipe? seized caliper? both!? something else? urgh.. I'll get it up on the stands tomorrow when it's light, I just wondered if anyone had experienced this? Cheers all! Quote Link to comment Share on other sites More sharing options...
iborguk Posted May 28, 2022 Report Share Posted May 28, 2022 Brake fluid level normal ? Quote Link to comment Share on other sites More sharing options...
½cwt Posted May 28, 2022 Report Share Posted May 28, 2022 (edited) Sticking caliper piston. Edited May 28, 2022 by ½cwt 3 Quote Link to comment Share on other sites More sharing options...
Tony Daniel Posted May 29, 2022 Report Share Posted May 29, 2022 11 hours ago, ½cwt said: Sticking caliper piston. This Quote Link to comment Share on other sites More sharing options...
edc Posted May 29, 2022 Report Share Posted May 29, 2022 Fluid boiled in that line. Quote Link to comment Share on other sites More sharing options...
TROOPER88 Posted May 29, 2022 Report Share Posted May 29, 2022 16 hours ago, joeluth said: Took the boxster out: Did 5 x 60 to 20mph braking sessions drove for a few miles to let the air get to them and then repeated. Completely got rid of the brushing noise and the brakes felt way better, bitey and quiet. Result! However: Something bad happened on the way home. Started to get a wobble through the steering wheel. went to brake, foot went to the floor, nothing! Pumped the brakes a few times and got some weak stopping power back, I assumed I'd burst a brake pipe. very very carefully got the car home, parked up and had a look. Passenger side front wheel - smoking hot compared to the others, with a noticeable smudge on the brake disc. Hopped back in and without starting the car I just pressed on the brake again and it went to the floor, pumped it a few times and it felt rock solid. Started the car up again and moved it back and forth a bit on the driveway, brakes felt great, really bitey again. I'm not sure what to make of it, burst pipe? seized caliper? both!? something else? urgh.. I'll get it up on the stands tomorrow when it's light, I just wondered if anyone had experienced this? Cheers all! You need to get the car to a specialist / someone who knows what they are doing. With all due respect, we are talking about brakes. You are fortunate not to have had an accident or even worse with the symptoms you are describing. Please do not DIY this. 2 Quote Link to comment Share on other sites More sharing options...
Topbox Posted May 29, 2022 Report Share Posted May 29, 2022 This could be an incompatible disc pad combination, a caliper and master cylinder failure now combined. Good luck, hope you get sorted soon. Quote Link to comment Share on other sites More sharing options...
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