Rebedding brakes?
#1
Drifting
Thread Starter
Rebedding brakes?
Is there a way of starting over and trying to bed the brakes again?
This is on my BMW, I put Pagid pads (street compound) with a ATE rotors all the way around. I tried bedding them by letting them heat up and doing some controlled stops. Now at halfway through braking the steering wheel shudders, I apply more brake and that goes away and brakes as it should. Should i remove the pads, take a scotch brite wheel to them and start over? Can I?
Anyone tried it?
This is on my BMW, I put Pagid pads (street compound) with a ATE rotors all the way around. I tried bedding them by letting them heat up and doing some controlled stops. Now at halfway through braking the steering wheel shudders, I apply more brake and that goes away and brakes as it should. Should i remove the pads, take a scotch brite wheel to them and start over? Can I?
Anyone tried it?
#2
Rennlist Member
Sounds like you glazed over the pads and rotors. I think you are on the right path towards a fix. You will also want to apply brake cleaner and a fine grit sandpaper to the rotors.
Keep in mind that Pagid pads are pretty sensitive to the bed in process. Go to their website for the instructions and follow them closely.
Keep in mind that Pagid pads are pretty sensitive to the bed in process. Go to their website for the instructions and follow them closely.
#3
Under the Lift
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I use a regular piece of coarse (150) sandpaper laid on the garage floor and just run the pads back and forth over it. Deglazes and levels them in 30 seconds.
#4
Rennlist Member
The info I found at this site helped me: http://www.stoptech.com/tech_info/wp...contents.shtml This is a good read as well: http://www.stoptech.com/tech_info/wp...rakedisk.shtml
#5
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Originally Posted by hinchcliffe
Is there a way of starting over and trying to bed the brakes again?
This is on my BMW, I put Pagid pads (street compound) with a ATE rotors all the way around. I tried bedding them by letting them heat up and doing some controlled stops. Now at halfway through braking the steering wheel shudders, I apply more brake and that goes away and brakes as it should. Should i remove the pads, take a scotch brite wheel to them and start over? Can I?
Anyone tried it?
This is on my BMW, I put Pagid pads (street compound) with a ATE rotors all the way around. I tried bedding them by letting them heat up and doing some controlled stops. Now at halfway through braking the steering wheel shudders, I apply more brake and that goes away and brakes as it should. Should i remove the pads, take a scotch brite wheel to them and start over? Can I?
Anyone tried it?
What speeds were you doing this at? Heating up street compound pads too much will cause them to "melt" just a little and leave deposits on your rotors which cause the vibration you speak of. My friend just made that mistake on his '99 M3... took street pads to a track event with RA1s and now his car feels like its going to fall apart whenever he brakes.
#6
Drifting
Thread Starter
To brak ethem in I did a few stops from 35 to 10 and then 50-20 and 60-30. All was sweet with them for the last 3-4 weeks. Just a couple days ago they gave the steering wheel a wobble halfway through slowing down for a stop. Seems to go away as I press the pedal harder.
#7
Rennlist Member
Basically, once your brakes are bedded properly, you can usually get them back shipshape with a couple hard stops then a cooldown. Worst thing you can do is sit stopped while things are still extremely hot with the pads clamped hard on the rotor. There's more tendency to do this in auto cars, IMHO, for example at that first red light at the bottom of the twisties.
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#9
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Originally Posted by SharkSkin
The info I found at this site helped me: http://www.stoptech.com/tech_info/wp...contents.shtml This is a good read as well: http://www.stoptech.com/tech_info/wp...rakedisk.shtml
These are some excellent articles... Good find!!
#10
Drifting
Thread Starter
I've never had a problem bedding new pads and rotors together. I'd prefer not to do a brake job three times before its bedded properly. That just sounds ridiculous. You really think when you take your car to a shop to get rotors and pads they do it that way. I have a hard time believing you have to do this.
it's not like it wobbles through the whole motion. ANd when I apply more the 50% braking the wobble goes away and is as smooth as normal.
it's not like it wobbles through the whole motion. ANd when I apply more the 50% braking the wobble goes away and is as smooth as normal.
#11
Race Director
Originally Posted by hinchcliffe
I've never had a problem bedding new pads and rotors together. I'd prefer not to do a brake job three times before its bedded properly. That just sounds ridiculous. You really think when you take your car to a shop to get rotors and pads they do it that way. I have a hard time believing you have to do this.
If you put new pads on new rotors the rotors will get a lot of pad residue where it expands the most wich is over the walls of the ventilation passages of the disc. This uneven spread of low friction zones leads to the vibrations. You can probably get away with scrubbing the disc with sandpaper to get away with it but it is much easier to just put the pads on first and bed them with the old rotors and then swap the rotors.