Squeaking brakes
Discussion
After recently replacing all discs and pads the brakes have developed a horrific 'squeal', ran them in for 300-400 miles, took the car out last Saturday and the front left has developed an awful noise upon light pressure being applied.
I was passing AM Wilmslow so popped in and they removed all the pads and applied 'Tuneup' (?), this didn't help ...
All I can think is something is stuck somewhere, small stone, etc.
Other than that the AMW said, they all do that ...
I was passing AM Wilmslow so popped in and they removed all the pads and applied 'Tuneup' (?), this didn't help ...
All I can think is something is stuck somewhere, small stone, etc.
Other than that the AMW said, they all do that ...
Done by main dealer with OEM.
I spoke to AM Brentford who did not apply anything, he said they never do for new parts only reinstalling old ones, AM Wilmslow have applied it to the pads, but did not remove the discs.
TuneUp is copper slip / grease, I am unsure of the spelling.
Pads have been bedded in, 100-10/90-10/60-10, numerous rolling stops.
No noise at high speed (although it may be drowned out).
Difficult to hear without the window open.
Seems to be at sub 40mph with light pressure on the brake pedal (like coming to a rolling stop).
I spoke to AM Brentford who did not apply anything, he said they never do for new parts only reinstalling old ones, AM Wilmslow have applied it to the pads, but did not remove the discs.
TuneUp is copper slip / grease, I am unsure of the spelling.
Pads have been bedded in, 100-10/90-10/60-10, numerous rolling stops.
No noise at high speed (although it may be drowned out).
Difficult to hear without the window open.
Seems to be at sub 40mph with light pressure on the brake pedal (like coming to a rolling stop).
Ah, okay. "Tune up" is a generic term over here in the US that's often used to make a shoddy maintenance job seem more comprehensive. Didn't realize it was a specific brand or product over there.
Brake squeal with light pressure, especially at lower vehicle speeds, usually means the pads need shims or grease/copper/etc on the backing plates.
Another issue is that the OEM pads often squeal regardless of what you do - that might be because of buildup on the leading edge of the friction surface. If you're set on staying with OEM pads, you could try chamfering the pads. The angle helps prevent buildup that causes squeal.
Here's a couple pictures to illustrate what I mean... The new pad is a Porterfield R4 (meant for track/racing) with zero chamfer. Squeals like a pig but has insane braking performance. The used pad is a Porterfield R4-S (meant for street driving) with a ton of chamfer. The R4-S is dead silent with practically no dust, so it's perfect for most people. Here's more info if you're interested: http://www.redpants.lol/blog/2016/5/21/porterfield...
Brake squeal with light pressure, especially at lower vehicle speeds, usually means the pads need shims or grease/copper/etc on the backing plates.
Another issue is that the OEM pads often squeal regardless of what you do - that might be because of buildup on the leading edge of the friction surface. If you're set on staying with OEM pads, you could try chamfering the pads. The angle helps prevent buildup that causes squeal.
Here's a couple pictures to illustrate what I mean... The new pad is a Porterfield R4 (meant for track/racing) with zero chamfer. Squeals like a pig but has insane braking performance. The used pad is a Porterfield R4-S (meant for street driving) with a ton of chamfer. The R4-S is dead silent with practically no dust, so it's perfect for most people. Here's more info if you're interested: http://www.redpants.lol/blog/2016/5/21/porterfield...
Edited by telum01 on Thursday 27th April 18:07
Still squeaking, put some serious heat / usage through them the alloys are absolutely caked in brake dust!
Fuming, new car park in Chester, nicely refurbished alloys, went over one of those things with spikes on that stop people going the wrong way, wheels were not perfectly straight up / over / straight into a curb
brilliant.
Car is back in storage until I next return to the UK ...
Will try and sort the squeak then.
I am also going to get another set of alloys, I have the 19" 10-Spoke Silver Diamond Turned and they are a nightmare to keep clean / looking good.
Also, some inconsiderate t**t has reversed / scraped past the car and left a small scratch on the front right of the bumper, charming, I don't know how people take out and use really valuable cars!
Fuming, new car park in Chester, nicely refurbished alloys, went over one of those things with spikes on that stop people going the wrong way, wheels were not perfectly straight up / over / straight into a curb
brilliant.Car is back in storage until I next return to the UK ...
Will try and sort the squeak then.
I am also going to get another set of alloys, I have the 19" 10-Spoke Silver Diamond Turned and they are a nightmare to keep clean / looking good.
Also, some inconsiderate t**t has reversed / scraped past the car and left a small scratch on the front right of the bumper, charming, I don't know how people take out and use really valuable cars!
I have recently swapped out front/rear pads and discs on my Vantage and used shims with Mintex Ceratec for back of shims/pads, retaining pins etc. So far (touch wood) I've not had any squealing from the brakes. I ended up buying Pagids for rear and EBC for the front (With some RS-4 porterfields to compare to after certain amount of miles for brake dust)
There's quite a few topics on here discussing the use of shims, but I thought I would use them and so far no squealing........not sure if this is the only reason, but very simple to put back in and see if the squealing stops.
There's quite a few topics on here discussing the use of shims, but I thought I would use them and so far no squealing........not sure if this is the only reason, but very simple to put back in and see if the squealing stops.
It doesn't sound like the sound is coming from between the rotors and the pads. I suspect it's the moving parts of the pad. I would pull them out, clean everything well, and put proper brake grease on every surface that comes in contact with the pads (besides near the rotor, of course). Springs, pins, back of the pad, along where the pad slides/rests on the caliper...
Brake squeal is almost always caused by the pad resonating/vibrating in the caliper.
Most common cures are to chamfer the edges of the pads, take a file & de-burr the edges of the backing plate of the pads, clean the disks thoroughly with brake cleaner, apply ceratec/shims or similar to the back of the pad & then take it out & re-bed the pads. Even all of that that may not cure it, or may do so only temporarily.
Sometimes the only option is new pads or another brand of pad and again, sometimes that won't cure it either!
Most common cures are to chamfer the edges of the pads, take a file & de-burr the edges of the backing plate of the pads, clean the disks thoroughly with brake cleaner, apply ceratec/shims or similar to the back of the pad & then take it out & re-bed the pads. Even all of that that may not cure it, or may do so only temporarily.
Sometimes the only option is new pads or another brand of pad and again, sometimes that won't cure it either!
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