Noises from new brakes

[RCC]

I had the front breaks on my Mazda5 replaced a little while ago at the dealership, new pads and rotors. Ever since it'd been making brake grinding noises the first time you drive the car in the morning or any other time it sits for long enough for the brake to completely cool down. It's been getting worse so when I took it back to the dealership of course the brakes were nice and warm, so no noises. They didn't find anything and just suggested that it could be dirt or other debris in the brakes but I can't see that being a constant problem.

I going to have a look at them myself this weekend when I take off my snow tires. I was also thinking about changing the pads again.

Has anyone had a similar problem or have any suggestions?

 

[jasma1]

RCC,

I had my brakes replaced after only 50 000kms not long time ago. Went to Midas to get them replaced. Apparently, they where worped and needed to be replaced.... 900.00$ later, I'm still suspicious about this. I know that I have a bad habit to do harsh braking (stopping at the last minute) but still...

Never the less... Since I had them replaced at Midas, they are squeeking like hell too! Unbelievable! In the morning, when it's cold, I'm almost shy to exit my driveway and stop at the end of the street...

And when the brakes are hot, you can still hear the squeeking a bit... With the summer coming on, and other cars stopped in traffic with their window down, I'm going to feel more shy about it..

Brought the vehicle to Midas again this week, to be simply told that "it was normal"... It was like having your finger to move around a crystal glass...

How can this be... anyways... If you have a look at it this weekend, let me know how it went.

 

[mazdadude]

Rust dust on rotors is most likely the culprit.

Before you get in you car in the morning, and while you are doing your vehicle walk around, look at the brake rotors. You will notice that they are covered by a thin layer of rust.

After the first 2-3 stops, the rust will be scrubbed off of the rotors by the brake pads.

Some pad/rotor combinations rust up more than others, but it is a normal condition caused by the rotor and brake pads, and it is going to be more pronounced in areas of high humidity, or cold weather.

 

[jasma1]

Thanks, Mazdadude for your info.

But how can it be, when the weather is fairly warm (for Canada), sunny all day, been driving for 20 minutes in the afternoon (brakes applied often in traffic, etc...), and you can still hear the noise??

I understand that when the weather is cold, first drive in the morning, or humid, you might notice more noise from the brakes.

But on mine, it seems that it's everytime I apply the brakes with a certain pressure... not hard, not smooth. Just the middle... The one you use the most!

Do you think its normal?

 

[Katner]

Thanks, Mazdadude for your info.

But how can it be, when the weather is fairly warm (for Canada), sunny all day, been driving for 20 minutes in the afternoon (brakes applied often in traffic, etc...), and you can still hear the noise??

I understand that when the weather is cold, first drive in the morning, or humid, you might notice more noise from the brakes.

But on mine, it seems that it's everytime I apply the brakes with a certain pressure... not hard, not smooth. Just the middle... The one you use the most!

Do you think its normal?

Hey Jas. Just want to let you know that my brakes have done the same thing off and on in the past. Seemed pretty random when it happened, and can't recall if it was in wet or dry weather. However they still felt nice and smooth under stopping pressure, and since it wasn't a constant noise I've thought nothing of it. I have noticed rust dust on them at times.

 

[mazdadude]

Thanks, Mazdadude for your info.

But how can it be, when the weather is fairly warm (for Canada), sunny all day, been driving for 20 minutes in the afternoon (brakes applied often in traffic, etc...), and you can still hear the noise??

I understand that when the weather is cold, first drive in the morning, or humid, you might notice more noise from the brakes.

But on mine, it seems that it's everytime I apply the brakes with a certain pressure... not hard, not smooth. Just the middle... The one you use the most!

Do you think its normal?

If it is making noise past the first few stops, then there must be other issues.

When car is cold, brakes cold, try inspecting, and running your fingers across the inner and outer rotor surfaces, and see if you can see or feel any grooves in the brake rotor.

 

[wmzda5]

Thanks, Mazdadude for your info.

But how can it be, when the weather is fairly warm (for Canada), sunny all day, been driving for 20 minutes in the afternoon (brakes applied often in traffic, etc...), and you can still hear the noise??

I understand that when the weather is cold, first drive in the morning, or humid, you might notice more noise from the brakes.

But on mine, it seems that it's everytime I apply the brakes with a certain pressure... not hard, not smooth. Just the middle... The one you use the most!

Do you think its normal?

I've had this before. The dealer lubed the caliper sliders at least thats what they told me. and never had that noise again, and its been more than a year now. Maybe just and alignment issue on the rotor-pads.

 

[RCC]

Had a look at my brakes and didn't find anything. I tried greasing up the caliper slides, but it still makes the same noise when the brakes are cold. It could be an alignment issue with the pads and rotors but it's going back to the dealership on April 18 for another look.

 

[RCC]

I had the brakes serviced again. They took everything apart and realigned it all and did something to the pads. I don't remember the word he used but it sound like they scuffed the surface of them. The noise so far seems to have gone away.

 

[RCC]

Well as soon as the weather got cooler the noise came back! It's more of a brake squeal type noise than grinding. Every time you move the car, when the brake are cold, the first couple times you use the brakes it makes the sound then that's it. But it's driving me crazy. I'm calling the dealership in the morning.

 

[SGT_OKINAWA]

1. Good thing you took the time to find your own thread and revive it from March 2009 (nana)

2. Sorry to hear about the brakes, (doh) but it's hard for US to make that call over the internet, because the old saying, if it looks like a duck, walks like a duck, sounds like a duck... it's problaby a duck comes into play here.

3. Now having said that, there could be SO MANY contributing factors, but I'll list a few that I think have not been said.

(Listed from most important to least IMO)

a. Cheap pads. Period.
b. Emory cloth the rotors and pads, see how that does.
c. Weather, i.e. SALT on the roads, or lots more water AND ...
d. Dry weather and the pads are getting 'stiff' and don't grab like 'warm brakes' do... good golly did I just say that, (boom07) I know it sounds crazy, but like I said, hard to do over the internet (sadbanana)
e. Do you have those metal covers that 'surround' the pads, those sometime collect lots of dirt and grime and can toss it back on the pads and rotors.
f. Little green men are sticking bits of dirt in there are you drive. (boom06)

Good luck, and I'd say cheap pads are the result, the materials use just 'grind' instead of squeeze like they are supposed to do.

Peace!(rei)

 

[hagow_boy]

There was a thread on this way back when I first joined this forum in 2007. It was very common, lots of people had the squealing. It happened to alot of Mazda 5 owners, almost guaranteed to happen first thing in the morning. I got them to change my calipers. It got rid of the loud squealing in the morning cold, but it still squeaked a bit on breaking. I got my front brake pads replaced at 45000 Kms at the dealership in Sept, and everthing is fine so far. No squealing yet, but it hasn't been cold enough either.

http://www.mazdas247.com/forum/showthread.php?t=123710117

 

[RCC]

.
f. Little green men are sticking bits of dirt in there are you drive. (boom06)

I thought that was the problem!

I do think it has something to do with the pads.

 

[RCC]

Thanks for the info Hagow Boy. It wouldn't bother me as much if it had always done this but I had no problems until after they replaced the brakes last year.
What dealership did you take yours to?

 

[hagow_boy]

I take my car to Metrotown Mazda, that is where I bought my Mazda 5 a few years ago. Maybe you can ask your dealership to check the caliper brackets.

Thanks for the info Hagow Boy. It wouldn't bother me as much if it had always done this but I had no problems until after they replaced the brakes last year.
What dealership did you take yours to?

 

[mpvue]

disc brakes are simple creatures, really. the caliper needs to be able to move freely on the slides. the BACK of the pad should have anti squealing compound put on (either a spray or goo in a tube, keeps the pads from vibrating) and the pads need to be BEDDED in. this basically allows the pads to become matched to the rotors. if this is not done, or you immediately go to hard braking w/ the new parts, the rotors and pads will GLAZE.
I would suggest taking them apart, cleaning everything, spraying the back of the pads, and scuffing up the pads and rotrs w/ a scotch brite pad. then do a couple of slow runs up to about 30mph, slowly apply the brakes (not to a stop) then up to 30 again, slow again, etc a few times to bed them in.

 

[skyhawk]

when the piston starts pushing on that brakepads towards the rotating rotor, and if the trailing end of the pad touches the rotor first, it will have to vibrate. They have to be perfectly flat (like when they are worn a bit) or the leading end have to touch first..

Just like on a bicycle.. where the pads are adjusted with a little 'toe-in'.

 

[RCC]

Well, I had the car at the dealership on Saturday. I got into am argument with the service guy and they chamfered both the front and rear pads but it didn't seam to do anything. I emailed the service manager and Mazda Canada today so I'll see if I get any responses.

 

[RCC]

I got a couple responses to my E-mails last week. Both the Dealership and Mazda Canada didn't really say much and didn't offer a solution. But today I received another message from the service manager saying he was in contact with Mazda about the problem and hope to ave a solution soon. So we'll see what happens.