sound when braking
- Thread starter pingman
- Start date
Re: sound when braking
albert,
better to get it check since coming from the brakes... safty first bro.
Such noise should not surface since you din change your brake pads or whatsoever.. My Z4 use to have such problem after changing the brake pads.. even after run in, the noise is still there.
albert,
better to get it check since coming from the brakes... safty first bro.
Such noise should not surface since you din change your brake pads or whatsoever.. My Z4 use to have such problem after changing the brake pads.. even after run in, the noise is still there.
Re: sound when braking
some update on this brake sound thing.
i did what orh lulu bro suggestion - step on the brake very hard and also do several ebrake for ABS to kick in for several times today.
apparently, after doing so, there is no more 'yyyyyeeee' sound.
anyway, the sound is intermitten, so i will monitor and update if there is any news.
thanks again orh lulu bro for the tip!!
some update on this brake sound thing.
i did what orh lulu bro suggestion - step on the brake very hard and also do several ebrake for ABS to kick in for several times today.
apparently, after doing so, there is no more 'yyyyyeeee' sound.
anyway, the sound is intermitten, so i will monitor and update if there is any news.
thanks again orh lulu bro for the tip!!
xuexun
Well-Known Member
Re: sound when braking
Hi pingman, i am alo experience the same yyyyeeee sound all the time. It started after i send in for a brake pad change about a year ago. Can't seem to hear from outside but only in the cabin... also like u describe, from the rear wheels.
Few months back, went for regular service, was told nothing was wrong, brakes are safe, they say they repositioned the pads and say i need to change the rotors on my next visit... Sound disappeared for a few days and now back again...
si bei sian tahan for so long already. Always ferry people they ask what sound is that then i say racing pads very hard, haha.... I suspect PML didn't even bother test driving my car to test the brake during the service. Anyway, i am gonna wait for rotors change already then see hows things.
If you have any methods that works please post. Thanks
Hi pingman, i am alo experience the same yyyyeeee sound all the time. It started after i send in for a brake pad change about a year ago. Can't seem to hear from outside but only in the cabin... also like u describe, from the rear wheels.
Few months back, went for regular service, was told nothing was wrong, brakes are safe, they say they repositioned the pads and say i need to change the rotors on my next visit... Sound disappeared for a few days and now back again...
si bei sian tahan for so long already. Always ferry people they ask what sound is that then i say racing pads very hard, haha.... I suspect PML didn't even bother test driving my car to test the brake during the service. Anyway, i am gonna wait for rotors change already then see hows things.
If you have any methods that works please post. Thanks
Re: sound when braking
personally i have done that before and it goes away for a week before coming back to haunt you again. it only went away when i have new pads and rotors. pingman, i hope the noise it will never be back again for you so keep your fingers crossed.
you can try orh lu lu's method to break in those brake pads but braking very very hard for a few times from high speed.xuexun said:
personally i have done that before and it goes away for a week before coming back to haunt you again. it only went away when i have new pads and rotors. pingman, i hope the noise it will never be back again for you so keep your fingers crossed.
Re: sound when braking
i did what ah orh bro and bmwf1 said, brake very very hard like nobody business. go get a secluded spot where there is no moving or stationary cars around, then do emergency brakes from 30km/h until the ABS kicks in and the tyres screech like heck. then depress the brake padel extremely hard multiple times on move-off at 5-10km/h till the car jerk (like a first timer driver). so far, after i did the above, no 'yyyyyeeee' sound. it sort of 'seasoned' the brake pads i think. is ur ride new one also?
nevertheless, the car rides still very well and if the intermitten sound ever comes back, then i will inform PML to change the rotor during my first sevicing.
xuexun said:
i did what ah orh bro and bmwf1 said, brake very very hard like nobody business. go get a secluded spot where there is no moving or stationary cars around, then do emergency brakes from 30km/h until the ABS kicks in and the tyres screech like heck. then depress the brake padel extremely hard multiple times on move-off at 5-10km/h till the car jerk (like a first timer driver). so far, after i did the above, no 'yyyyyeeee' sound. it sort of 'seasoned' the brake pads i think. is ur ride new one also?
nevertheless, the car rides still very well and if the intermitten sound ever comes back, then i will inform PML to change the rotor during my first sevicing.
xuexun
Well-Known Member
Re: sound when braking
erm my car is not new... sound came after 1 year after i got the car and happened after PML changed the brake pads
erm my car is not new... sound came after 1 year after i got the car and happened after PML changed the brake pads
pingman said:i did what ah orh bro and bmwf1 said, brake very very hard like nobody business. go get a secluded spot where there is no moving or stationary cars around, then do emergency brakes from 30km/h until the ABS kicks in and the tyres screech like heck. then depress the brake padel extremely hard multiple times on move-off at 5-10km/h till the car jerk (like a first timer driver). so far, after i did the above, no 'yyyyyeeee' sound. it sort of 'seasoned' the brake pads i think. is ur ride new one also?
nevertheless, the car rides still very well and if the intermitten sound ever comes back, then i will inform PML to change the rotor during my first sevicing.
yendor
Well-Known Member
Re: sound when braking
Let me share a little...
Brake squeals are now more common with most pad manufacturers adding in a little metal into the compound to increase heat transfer after asbestos was banned from pad materials. The squeals may occur from a couple of reasons:
1. The pads contact the leading edge of the discs squarely and thus grinds itself on the disc. This is a little like bikes where the trailing pads must contact before the leading edge. Car manufacturers either implement this with a little scallop on the pad backing plate of thru a triangular shim in front of the piston. Look at the multi-piston brake callipers. You can see that the leading pistons are always smaller than the trailing pistons. You can solve this by either tapering off about 3mm off the leading edges of the pad or using anti-brake squeal compound on the pads inbetween the piston/callipers and pads
2. The edges of the pads are rubbing on the disc. This usually happens after about 10-15k km where you can actually feel a lip on the edge of a brake disc. The only way to clear this is through skimming the discs.
3. Race pads squeal, becos of high metal content, you cannot get past this.... Live with it...
You guys got any more questions?
Cheers
Let me share a little...
Brake squeals are now more common with most pad manufacturers adding in a little metal into the compound to increase heat transfer after asbestos was banned from pad materials. The squeals may occur from a couple of reasons:
1. The pads contact the leading edge of the discs squarely and thus grinds itself on the disc. This is a little like bikes where the trailing pads must contact before the leading edge. Car manufacturers either implement this with a little scallop on the pad backing plate of thru a triangular shim in front of the piston. Look at the multi-piston brake callipers. You can see that the leading pistons are always smaller than the trailing pistons. You can solve this by either tapering off about 3mm off the leading edges of the pad or using anti-brake squeal compound on the pads inbetween the piston/callipers and pads
2. The edges of the pads are rubbing on the disc. This usually happens after about 10-15k km where you can actually feel a lip on the edge of a brake disc. The only way to clear this is through skimming the discs.
3. Race pads squeal, becos of high metal content, you cannot get past this.... Live with it...
You guys got any more questions?
Cheers
Re: sound when braking
hi yendor. i went to BVO to get it checked out by ah wee. he took a close look at the wheel assembly and he said my brakepad and rotor are fine. there is some kinda of cream to coat the pad to remove the sound, but i dont want it as it is not permanent.
regarding what u said in item 2, do u have a separate workshop that i can get another opinion from?
hi yendor. i went to BVO to get it checked out by ah wee. he took a close look at the wheel assembly and he said my brakepad and rotor are fine. there is some kinda of cream to coat the pad to remove the sound, but i dont want it as it is not permanent.
regarding what u said in item 2, do u have a separate workshop that i can get another opinion from?
yendor
Well-Known Member
Re: sound when braking
Well, there are 2 types of "cream" The first type is the one that goes by reducing the resonance (usually silicone based solutions that cure with heat to become slightly rubbery type) CRC Break Squeal eliminator (orange colour) is an example.
The other type is the lubrication type that uses anti-sieze compound to help the pads move in and out. The lubricant is easy to spot, usally has copper flakes or silver flakes in an oil based compound.
Which type works better? The sticky type works better for race pads that to not have the shims. If the pads are stock, they can still work too. The lubrication way only works for a while.
if you like to reduce the noise for race pads, you can insert a single small sheet (about 1cm x 3cm) of aluminium can material behind the trailing finger of the original brake calipers. That way, the trailing edge of the brake pads will have slightly greater braking pressures and that should solve most squealing problems.
I myself am using this method cos my ceramic pads do make some noise. I cannot recommend any wksp cos i DIY... sorry
Cheers
pingman said:
Well, there are 2 types of "cream" The first type is the one that goes by reducing the resonance (usually silicone based solutions that cure with heat to become slightly rubbery type) CRC Break Squeal eliminator (orange colour) is an example.
The other type is the lubrication type that uses anti-sieze compound to help the pads move in and out. The lubricant is easy to spot, usally has copper flakes or silver flakes in an oil based compound.
Which type works better? The sticky type works better for race pads that to not have the shims. If the pads are stock, they can still work too. The lubrication way only works for a while.
if you like to reduce the noise for race pads, you can insert a single small sheet (about 1cm x 3cm) of aluminium can material behind the trailing finger of the original brake calipers. That way, the trailing edge of the brake pads will have slightly greater braking pressures and that should solve most squealing problems.
I myself am using this method cos my ceramic pads do make some noise. I cannot recommend any wksp cos i DIY... sorry
Cheers
Re: sound when braking
Hi all. Just some update on the squeal from rear brakes...
Finally have time to go down to PML to get CSA to do a test drive to see if the squeal has any danger to ride. CSA confirm no danger and say that to solve the problem, need to bring the car in for servicing on brakes at about 200$ for all 4 wheels. CSA say pebbles or brake dust maybe stuck in the brake well and rotor. so i said to CSA that i will come back to him when my ride is due for 20k servicing since it is no risk to normal driving. CSA also took a drive down ECP and teach me the brake hard technique that was spoken about here previous. I spent total of 1.5 hours at PML KA.
Once done with them, I went immediately to Ah Wee at BVO and got him to do one more inspection on the brake rotors and decide to do a servicing there for both rear wheel. Rotors and brake pads are fine, so no need to change. the regular servicing was recommended and whole thing takes 30 minutes. Ah Wee did was sands the brake pad, trim the pad edges and added the brake lube paste just like Yendor said.
Since BVO ah wee expert service, brakes are now still silence. No more squeal, no need braking hard regularly, no more funny pebble and dust stuck reasons from CSA. I am very happy now. hope others who are facing this common conti problem will be able to benefit from this info. Kudos to Ah Wee from BVO for his fast and expert services.
Thanks.
Hi all. Just some update on the squeal from rear brakes...
Finally have time to go down to PML to get CSA to do a test drive to see if the squeal has any danger to ride. CSA confirm no danger and say that to solve the problem, need to bring the car in for servicing on brakes at about 200$ for all 4 wheels. CSA say pebbles or brake dust maybe stuck in the brake well and rotor. so i said to CSA that i will come back to him when my ride is due for 20k servicing since it is no risk to normal driving. CSA also took a drive down ECP and teach me the brake hard technique that was spoken about here previous. I spent total of 1.5 hours at PML KA.
Once done with them, I went immediately to Ah Wee at BVO and got him to do one more inspection on the brake rotors and decide to do a servicing there for both rear wheel. Rotors and brake pads are fine, so no need to change. the regular servicing was recommended and whole thing takes 30 minutes. Ah Wee did was sands the brake pad, trim the pad edges and added the brake lube paste just like Yendor said.
Since BVO ah wee expert service, brakes are now still silence. No more squeal, no need braking hard regularly, no more funny pebble and dust stuck reasons from CSA. I am very happy now. hope others who are facing this common conti problem will be able to benefit from this info. Kudos to Ah Wee from BVO for his fast and expert services.
Thanks.
Re: sound when braking
if you are not contributing to the thread, can you please do not post you own comments!Evo9 said:8 months only and got this type of sh!t problem?
My advice to you lah ... sell it and get a Merc or a Lexus.
End of your complaints.
Re: sound when braking
evo9. i dont know what are your intentions. but i will take it as a good one. so thanks for your advice.
since you like to bring the lexus word up everywhere in this bmw-sg forum, i will just share my experience with lexus and the dealer.
my lexuses also have plenty of problems. most people understand the fact that as long as u drive your vehicle, problems are expected over time. the important thing is how to find the right guru to understand better and service the vehicle at the most competitive price.
the following link will allow you to understand what i meant better and perhaps stop you from promoting the lexus brand while insulting everyone and every other car make so obessively.
http://www.bmw-sg.com/forums/other-marques/9050-my-lexus-problems.html
evo9. i dont know what are your intentions. but i will take it as a good one. so thanks for your advice.
since you like to bring the lexus word up everywhere in this bmw-sg forum, i will just share my experience with lexus and the dealer.
my lexuses also have plenty of problems. most people understand the fact that as long as u drive your vehicle, problems are expected over time. the important thing is how to find the right guru to understand better and service the vehicle at the most competitive price.
the following link will allow you to understand what i meant better and perhaps stop you from promoting the lexus brand while insulting everyone and every other car make so obessively.
http://www.bmw-sg.com/forums/other-marques/9050-my-lexus-problems.html
VolanteDB9
Users Awaiting Email Confirmation
Re: sound when braking
sibeh sian...having e same problem after brakepads changed at PML...passengers also wondering...brrrrrrrrr
xuexun;101556 said:
sibeh sian...having e same problem after brakepads changed at PML...passengers also wondering...brrrrrrrrr
Re: sound when braking
hi there ! I have the same problem with the brake sound when coming to a halt. Will also try the advice suggested by some of you guys. However, i find it hard to cope with the black dust that cover on the rims. M sick of the regular cleaning? Should I change to a less dusty pads? Care to advise ? Cheers
hi there ! I have the same problem with the brake sound when coming to a halt. Will also try the advice suggested by some of you guys. However, i find it hard to cope with the black dust that cover on the rims. M sick of the regular cleaning? Should I change to a less dusty pads? Care to advise ? Cheers
