Odd Noise when breaking - Toyota Yaris Forums

brotan1x · 08-24-2009, 08:52 PM

I receently started hearing this sound. I took it into the dealer (carmax) but they could not find anything wrong with the brakes.

After driving about 35 to 45 minutes on the highway (when its good and warm)and then using the brakes I hear a wierd sound. Its actually sounds like what an 18 wheelers breaks sound like when breaking. Its clearly coming from the front of the car. It in no way sounds like grinding or bad break pads.

I am still under factory warranty.. However I am not sure how to explain it.. I am wondering if anyone else has experienced the sound. Might this be an undocumented/unadvertised feature?

THoughts?

Sheesh I feel like a idiot.. I spelled it breaking instead of braking.. What a goof I am.. .Please don't think less of me.

silver_echo · 08-25-2009, 03:57 PM

what brand of brake pads are on it? have the brakes been serviced? how many miles? OEM rotors? after market?

brotan1x · 08-26-2009, 08:00 AM

Unfortunatly I am a computer guy and not familiar enough with cars these days. The main reason I joined this site was to get more aquainted with the vehicle I owned.. (a major first for me)

Not sure about the components of the brake system. The parts look like brake components to me..

I bought it at Carmax about a month ago. I am at 26k miles right now. I am confident that Carmax replaced the brake pads before I got it but I have no way of confirming that notion. Carmax told me that the brakes look 'up to spec' when i took it in for the first oil change (yes I have already driven the first 3K and am being quite conservative)

Thanks for answering.. Your question gives me direction to go with when I go talk to Toyota dealer.

jambo101 · 08-26-2009, 10:35 AM

If your car was driven by a person who was easy on the brakes the pads and rotors may have become glazed which results in weird groaning noises at low speeds and hissing noises at higher speeds,have your mechanic inspect and turn the rotors for you and dont let any one talk you into new rotors at that mileage.

brotan1x · 08-26-2009, 01:28 PM

Thanks for the responses guys. I am going to make an appointment with the Toyota dealer for next week.

Question--- If it is the 'glaze efect' that causes the groaning what would be the long term concern for me?

Tamago · 08-26-2009, 01:38 PM

go out and do some heavy panic stops on a deserted road. a couple 60-0 at threshold braking. you'll probably fix the problem yourself :) just don't do it where someone could rear-end you or you get spotted by the cops. they don't seem to understand these things

jambo101 · 08-26-2009, 04:46 PM

Quote:

Originally Posted by Tamago

go out and do some heavy panic stops on a deserted road. a couple 60-0 at threshold braking. you'll probably fix the problem yourself :) just don't do it where someone could rear-end you or you get spotted by the cops. they don't seem to understand these things

Thats the way to condition new brakes and rotors...

Tamago · 08-26-2009, 05:07 PM

Quote:

Originally Posted by jambo101

Thats the way to condition new brakes and rotors...

yep, sure is

1stToyota · 08-26-2009, 05:33 PM

Last instructions I came across (I think from an expensive set of KVR rotors and pads?) said to use moderate force, 40-0mph, 5-6 times with about 1 mile pause between stops, then let cool for at least 1 hour.

Kaotic Lazagna · 08-26-2009, 07:54 PM

hmmm, I think I won't have a choice but to change my pads out at my mom's apartment instead of my place, so would I be able to do the bedding procedure within the confines of the parking lot?

supmet · 08-26-2009, 08:01 PM

Quote:

Originally Posted by 1stToyota

Last instructions I came across (I think from an expensive set of KVR rotors and pads?) said to use moderate force, 40-0mph, 5-6 times with about 1 mile pause between stops, then let cool for at least 1 hour.

You don't wanna do 40-0, do 60-20. More force and you really don't wanna come to a complete stop with hot brakes. The carbotech rep said to do 60-20 and get back up to 60 about as fast as you can and then slam back down to 20 5 times in a row, wait a minute or two, and then do it again.

And no, you can't bed brakes in a parking lot. Best place is a track, but a good open road will do.

Kaotic Lazagna · 08-26-2009, 08:05 PM

Damn it. hahahaha, that means I'm going to have to do it else where (and while in school, not what I hoped for). Probably at might old neighbor's place since there's an open road there.

Yaris Hilton · 08-27-2009, 12:06 AM

If you're using normal, not special racing, pads and are going to be driving relatively normally, no special breakin procedure is needed. Just drive and use your brakes normally.

Kaotic Lazagna · 08-27-2009, 12:48 AM

They're upgraded street pads. I'd rather be safe than sorry, so I'll follow the bedding procedures included with them.

YarisSedan · 08-27-2009, 03:04 AM

I think depending on where you are the law is all used cars sold have to have atleast 40% remaining brake pad lining left. If not they have to be replaced. Guess what most dealers do what we call in the industry as a "pad slap" Slapping some pads and typically the cheapest one to bring the vehicle up to standard meaning aftermarket non oem parts and not machining the brake rotor. Which usually results in brakes that take extremly long to break in.. Especially if the rotor is already glazed to begin with. And everything that you describe would lead me to believe that is what is going on. What could be done to remedy the situation would be to take the brake pads out. Lightly sand them to a flat surface and have the rotors turned. Then relube everything. When putting the brake pads back put a light coating of brake lube inbetween the brake shim and the pad and outside of the shim as well. That will help dampen any vibration.

1stToyota · 08-27-2009, 08:07 AM

Quote:

Originally Posted by 1stToyota

Last instructions I came across (I think from an expensive set of KVR rotors and pads?) said to use moderate force, 40-0mph, 5-6 times with about 1 mile pause between stops, then let cool for at least 1 hour.

Quote:

Originally Posted by supmet

You don't wanna do 40-0, do 60-20. More force and you really don't wanna come to a complete stop with hot brakes. The carbotech rep said to do 60-20 and get back up to 60 about as fast as you can and then slam back down to 20 5 times in a row, wait a minute or two, and then do it again.

And no, you can't bed brakes in a parking lot. Best place is a track, but a good open road will do.

I was following manufacturer instructions, not listening to a rep...and my keyword was moderate force.

TheSilkySmooth · 08-27-2009, 08:40 AM

I wouldnt think the original pads would have been replaced at 24000. Might be A pebble stuck in caliper - or - the car was hit and rebuilt wrong. Or tires/wheel bearing since you said it get worse when it heats up. I hope you didnt pay full used retail ... Anyway the car is coverd still by the Toyota B>B warranty (I think).

TheSilkySmooth · 08-27-2009, 08:42 AM

Quote:

Originally Posted by 1stToyota

I was following manufacturer instructions, not listening to a rep...and my keyword was moderate force.

Why would you follow the MANUFACTURER's instruction and not the advice of this well seasoned Forum? ;)

08-24-2009, 08:52 PM	#1
brotan1x The Mobile Computer Tech Drives: 2008 Toyota Yaris Liftback Join Date: Aug 2009 Location: DFW-Texas Posts: 51	Odd Noise when breaking I receently started hearing this sound. I took it into the dealer (carmax) but they could not find anything wrong with the brakes. After driving about 35 to 45 minutes on the highway (when its good and warm)and then using the brakes I hear a wierd sound. Its actually sounds like what an 18 wheelers breaks sound like when breaking. Its clearly coming from the front of the car. It in no way sounds like grinding or bad break pads. I am still under factory warranty.. However I am not sure how to explain it.. I am wondering if anyone else has experienced the sound. Might this be an undocumented/unadvertised feature? THoughts? Sheesh I feel like a idiot.. I spelled it breaking instead of braking.. What a goof I am.. .Please don't think less of me. __________________ Brotan1x (Ed) - The Mobile Computer Tech The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I'm just not close enough to get the job done." George Carlin (1937 - 2008) Last edited by brotan1x; 08-25-2009 at 07:43 AM.

08-25-2009, 03:57 PM	#2
silver_echo ekodrvr View User's Garage Drives: 2002 white subaru impreza wrx Join Date: Feb 2009 Location: Spokane, WA Posts: 776	what brand of brake pads are on it? have the brakes been serviced? how many miles? OEM rotors? after market? __________________ if you want to see my plans for this car, check out here... http://www.cardomain.com/ride/3154316 i like this smiley...

08-26-2009, 08:00 AM	#3
brotan1x The Mobile Computer Tech Drives: 2008 Toyota Yaris Liftback Join Date: Aug 2009 Location: DFW-Texas Posts: 51	Unfortunatly I am a computer guy and not familiar enough with cars these days. The main reason I joined this site was to get more aquainted with the vehicle I owned.. (a major first for me) Not sure about the components of the brake system. The parts look like brake components to me.. I bought it at Carmax about a month ago. I am at 26k miles right now. I am confident that Carmax replaced the brake pads before I got it but I have no way of confirming that notion. Carmax told me that the brakes look 'up to spec' when i took it in for the first oil change (yes I have already driven the first 3K and am being quite conservative) Thanks for answering.. Your question gives me direction to go with when I go talk to Toyota dealer. __________________ Brotan1x (Ed) - The Mobile Computer Tech The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I'm just not close enough to get the job done." George Carlin (1937 - 2008)

08-26-2009, 01:28 PM	#5
brotan1x The Mobile Computer Tech Drives: 2008 Toyota Yaris Liftback Join Date: Aug 2009 Location: DFW-Texas Posts: 51	Thanks for the responses guys. I am going to make an appointment with the Toyota dealer for next week. Question--- If it is the 'glaze efect' that causes the groaning what would be the long term concern for me? __________________ Brotan1x (Ed) - The Mobile Computer Tech The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I'm just not close enough to get the job done." George Carlin (1937 - 2008)

08-26-2009, 05:33 PM	#9
1stToyota Drives: 2013 Chevy Spark 1LT 5-speed Join Date: Oct 2008 Location: Oklahoma Posts: 1,185	Last instructions I came across (I think from an expensive set of KVR rotors and pads?) said to use moderate force, 40-0mph, 5-6 times with about 1 mile pause between stops, then let cool for at least 1 hour. __________________ 1997 Lincoln Town Car - *SOLD* 2008 Scion xD (w/ automatic) - SOLD 2008 Yaris HB - SOLD

08-26-2009, 10:35 AM	#4
jambo101 Drives: yaris 08 sedan Join Date: Oct 2008 Location: Montreal Canada Posts: 1,286	If your car was driven by a person who was easy on the brakes the pads and rotors may have become glazed which results in weird groaning noises at low speeds and hissing noises at higher speeds,have your mechanic inspect and turn the rotors for you and dont let any one talk you into new rotors at that mileage.

08-26-2009, 07:54 PM	#10
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	hmmm, I think I won't have a choice but to change my pads out at my mom's apartment instead of my place, so would I be able to do the bedding procedure within the confines of the parking lot?

08-26-2009, 08:05 PM	#12
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	Damn it. hahahaha, that means I'm going to have to do it else where (and while in school, not what I hoped for). Probably at might old neighbor's place since there's an open road there.

08-27-2009, 12:06 AM	#13
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	If you're using normal, not special racing, pads and are going to be driving relatively normally, no special breakin procedure is needed. Just drive and use your brakes normally.

08-27-2009, 12:48 AM	#14
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	They're upgraded street pads. I'd rather be safe than sorry, so I'll follow the bedding procedures included with them.

08-27-2009, 03:04 AM	#15
YarisSedan Drives: 08 Yaris Sedan Join Date: Oct 2008 Location: California - Bay Area Posts: 2,773	I think depending on where you are the law is all used cars sold have to have atleast 40% remaining brake pad lining left. If not they have to be replaced. Guess what most dealers do what we call in the industry as a "pad slap" Slapping some pads and typically the cheapest one to bring the vehicle up to standard meaning aftermarket non oem parts and not machining the brake rotor. Which usually results in brakes that take extremly long to break in.. Especially if the rotor is already glazed to begin with. And everything that you describe would lead me to believe that is what is going on. What could be done to remedy the situation would be to take the brake pads out. Lightly sand them to a flat surface and have the rotors turned. Then relube everything. When putting the brake pads back put a light coating of brake lube inbetween the brake shim and the pad and outside of the shim as well. That will help dampen any vibration. __________________ http://www.cardomain.com/ride/3210549

08-27-2009, 08:40 AM	#17
TheSilkySmooth Drives: 08 3DR 5M Bayou Blue; 09 Fos Join Date: Oct 2008 Location: New Hampshire Posts: 622	I wouldnt think the original pads would have been replaced at 24000. Might be A pebble stuck in caliper - or - the car was hit and rebuilt wrong. Or tires/wheel bearing since you said it get worse when it heats up. I hope you didnt pay full used retail ... Anyway the car is coverd still by the Toyota B>B warranty (I think).

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