Facelift Squeaky brakes

[replicant71]

Unfortunately, I appear to have the squeaky brakes syndrome on my car.

I'm going to book it in for the dealer to take a look, so, realistically, what are they going to say or do? Is it a case of having to put up with it as it's a "characteristic of these RS brakes" or is there an actual fix that works?

Or, does this problem resolve itself after the brakes have worn in? Mine's only done about 300 miles so far.

Cheers.

 

[sve170]

Unfortunately, I appear to have the squeaky brakes syndrome on my car.

I'm going to book it in for the dealer to take a look, so, realistically, what are they going to say or do? Is it a case of having to put up with it as it's a "characteristic of these RS brakes" or is there an actual fix that works?

Or, does this problem resolve itself after the brakes have worn in? Mine's only done about 300 miles so far.

Cheers.

My FL has now got 800ml on clock and the initial squeaky brakes has almost disappeared. Was very poor during early miles but seems to have bedded in now with just the odd squeak now and again.


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[Phil3]

I had it early on too, but getting toward 1000 miles now and *touch-wood haven’t head it for some time... try a few harsher stops from a decent speed and it’ll clear it

 

[replicant71]

Cheers @sve170 and @Phil3 sounds encouraging!

 

[Hal Adams]

If your dealer pulls the 'it is an RS3 characteristic', shout him down. It is only a characteristic because the RS3 brakes are badly designed, and it is up to them to put it right.

Brake squeel is the high frequency vibration produced when metal touches metal. In this case, the brake pad backing plate vibrating in the caliper. It will not happen at high speed because the force is locking the pad tightly against the caliper. Generally the lower the speed, the more the squeel because the pad is able to move in the caliper. The only reason it might reduce with age is that there is a build up of dust between the pad backing plate and where it hits the caliper.

The band-aid fix is to smear anti-squeel paste on the pad backing plate; the cure is to replace the pads with ones that have a tighetr fit in the caliper.

 

[replicant71]

Thanks @Hal Adams, that's very informative

 

[dno_uk]

I had the same squeal during the first few hundred miles but after some more 'enthusiastic' driving I'm pleased to say it's completely gone now.

 

[AudiNutta]

If your dealer pulls the 'it is an RS3 characteristic', shout him down. It is only a characteristic because the RS3 brakes are badly designed, and it is up to them to put it right.

Brake squeel is the high frequency vibration produced when metal touches metal. In this case, the brake pad backing plate vibrating in the caliper. It will not happen at high speed because the force is locking the pad tightly against the caliper. Generally the lower the speed, the more the squeel because the pad is able to move in the caliper. The only reason it might reduce with age is that there is a build up of dust between the pad backing plate and where it hits the caliper.

The band-aid fix is to smear anti-squeel paste on the pad backing plate; the cure is to replace the pads with ones that have a tighetr fit in the caliper.

You say it doesn’t happen at high speed, help me with absolutely horrific brake squeal on the Mrs’ car. I replaced the discs and pads last week, used the Mintex anti seize grease they swear by and it’s horrific at speeds of around 30mph under heavy braking also.

 

[JamesCrs3]

The one time I noticed brake squeal was when i got stuck in slow moving traffic for about 45 mins. I usually never drive in traffic because I work shifts. Do all you guys who have this brake squeal usually drive in traffic?

 

[Spinstorm]

I have this too - now at 7k miles and with the windows open and roof its very loud and not nice.

I asked the dealer to check when I took the car in for the issue with the wheel but it wasn’t making any noises. I emailed the lady at the audi executive office to see what she says.

I will have to take it to them next week when it is squeaking so I can show them but it shouldn’t sound like that on a new car.

 

[Hal Adams]

You say it doesn’t happen at high speed, help me with absolutely horrific brake squeal on the Mrs’ car. I replaced the discs and pads last week, used the Mintex anti seize grease they swear by and it’s horrific at speeds of around 30mph under heavy braking also.

You say it squeels under heavy braking - so, you jam your foot on the brake all the way. Does it squeel immediately the brakes are applied, or is it quiet at first and then the squeel sets in?

If brakes squeel from the moment they are agresively applied, then there is a problem. If the squeel comes in after the brakes are applied, it means the pads are not locked hard onto the caliper and they are free to vibrate.

If your brakes are squeeling after you have applied anti-squeel paste, then there must be an area you have not covered, the pad springs are worn out/missing or the pads are just too small for the calipers.

 

[replicant71]

The one time I noticed brake squeal was when i got stuck in slow moving traffic for about 45 mins. I usually never drive in traffic because I work shifts. Do all you guys who have this brake squeal usually drive in traffic?

Yes, I only get the squeal when braking at very slow speeds, i.e. when sat in traffic. Just as the car almost comes to a halt, the brakes squeal.

 

[fastolsen]

Mine squealed up to 1000km, after that it haven't squealed once.. At 7000km now.. Use them

 

[T-800]

If your dealer pulls the 'it is an RS3 characteristic', shout him down. It is only a characteristic because the RS3 brakes are badly designed, and it is up to them to put it right.

Brake squeel is the high frequency vibration produced when metal touches metal. In this case, the brake pad backing plate vibrating in the caliper. It will not happen at high speed because the force is locking the pad tightly against the caliper. Generally the lower the speed, the more the squeel because the pad is able to move in the caliper. The only reason it might reduce with age is that there is a build up of dust between the pad backing plate and where it hits the caliper.

The band-aid fix is to smear anti-squeel paste on the pad backing plate; the cure is to replace the pads with ones that have a tighetr fit in the caliper.

Poppycock......


8P RS3 i had squealed from day 1, after 3 sets of the Audi 'Fix' i had enough and decided to strip them down for a look.

Pads were tight in the 4 pot caliper, so much so i struggled to get them out !

Once out i cleaned everything up and used brake grease on the rear/top and btm edges where they sit.....result ? still squealed no different, so took them out and filed off a little from the top and bottom to give them a little more clearance, result......still squealed as before.

Only pad i had on the 8P RS3 that had no squeal where the Ferodo DS performance (NOT 2500)

8V RS3 2015 car i had was fine for a while but same thing developed after a few thousand miles, so again off the wheel came and again the pads where jammed in the caliper which is weird because the 8V pads are tapered and not parallel like the 8P are, but none the less for a relatively 'new' pad they didn't come out easy.
Didn't mess around this time so just bought the Ferodo DS pads, used Wurth anti-squeal spray on and fitted them..........squeal gone for good, better bite and the more they where used the better they where.

8V RS3 FL car has been fine up until the warmer weather, but has just exhibited it's first sign of low speed squeal, even some hard use didn't stop it, so again when the dedicated RS3 Ferodo DS pads are released i shall be fitting them to this car.

 

[Hal Adams]

From your put-down, I guess that you are not intimately familiar with the subject of acoustic emission.

Regardless of the material, when it is upset or excited by another material, a sound is produced dependent on the materials involved.

A squeal is in the high frequency bracket and produced [in this case] by steel on steel. I use the term steel loosely. the friction material of a brake pad on steel produces a noise in the mid frequency range which is tolerable to human hearing. However, this changes with slip or groan where the noise is in a lower band range that can be uncomfortable to some.

From your submission, it would appear to me, IF there are no other factors, that if only DS Performance pads cured the squeal, then all other pads must have steel strands in the friction material. We know this is not the case, so there must be another factor. Generally in car braking systems, high frequency vibration noise is from pads in the calipers or in cases, extreme glazing of pads - but this is generally accompanied with poor stopping performance.

There are many thesis papers on the subject, but they get complicated to read. However, one that is worthy of a reaqd is:
https://www.head-acoustics.com/downloads/messen/Internoise2007_Paper_Mauer.pdf

Carroll Smith, of Shelby and GT40 engineering fame has written extensively on brake noises and 'warping' that is worth a read.

Maybe the most reader friendly on the subject that I have ever seen is this:
https://www.popularmechanics.com/cars/how-to/a3092/4317748/

 

[T-800]

From your put-down, I guess that you are not intimately familiar with the subject of acoustic emission.

Regardless of the material, when it is upset or excited by another material, a sound is produced dependent on the materials involved.

A squeal is in the high frequency bracket and produced [in this case] by steel on steel. I use the term steel loosely. the friction material of a brake pad on steel produces a noise in the mid frequency range which is tolerable to human hearing. However, this changes with slip or groan where the noise is in a lower band range that can be uncomfortable to some.

From your submission, it would appear to me, IF there are no other factors, that if only DS Performance pads cured the squeal, then all other pads must have steel strands in the friction material. We know this is not the case, so there must be another factor. Generally in car braking systems, high frequency vibration noise is from pads in the calipers or in cases, extreme glazing of pads - but this is generally accompanied with poor stopping performance.

There are many thesis papers on the subject, but they get complicated to read. However, one that is worthy of a reaqd is:
https://www.head-acoustics.com/downloads/messen/Internoise2007_Paper_Mauer.pdf

Carroll Smith, of Shelby and GT40 engineering fame has written extensively on brake noises and 'warping' that is worth a read.

Maybe the most reader friendly on the subject that I have ever seen is this:
https://www.popularmechanics.com/cars/how-to/a3092/4317748/

No put down......

But your suggestion of a pad that is a tighter fit in the caliper doesn’t hold mustard with me.....

Audi went the ‘acoustic’ way when they started adding ‘Tuned mass dampers’ to the 8P RS3 in an attempt to reduce the squeal......didn’t work on mine / other peoples cars, in fact they made no difference on / off the car.....

Then on the 8V they started to introduce different ‘tuned mass dampers’ to suppress the squeal....again most owners say the squeal still persisted.

I have always believed to this day the OEM Audi pads are Rubbish, period.

 

[Terminator x]

The brakes are poor generally imho, the one thing that let's every RS down. If only Audi offered proper brake upgrades as an option!

TX.

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AP Racing front + rear brakes in for sale section

 

[T-800]

The brakes are poor generally imho, the one thing that let's every RS down. If only Audi offered proper brake upgrades as an option!

TX.

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AP Racing front + rear brakes in for sale section

ah I see what you did there TX

 

[Terminator x]

What DO you mean

TX.

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AP Racing front + rear brakes in for sale section

 

[T-800]

What DO you mean

TX.

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AP Racing front + rear brakes in for sale section

Subliminal selling........

I must.....r..e..s..i..s..t your sales pitch