Brakes @ 29K??
11-06-2018, 09:43 AM
#31
AudiWorld Super User
I agree, but I don't know how many times I see mechanics just use a impact wrench to tighten the bolts.
11-06-2018, 10:53 AM
#32
AudiWorld Super User
Yeah u probably read it wrong. I've used the stop tech article for years.
Did I read this read, the bed in procedure calls for driving the car as fast as possible with the brakes applied, that doesn't sound right. A fast build up of heat in the pads and rotors can cause the rotor to warp and the pads to glaze up. In fact, different pad manufacturers recommend different bed in procedures.
https://www.tirerack.com/tires/tiret....jsp?techid=85
https://www.tirerack.com/tires/tiret....jsp?techid=85
11-06-2018, 10:57 AM
#33
AudiWorld Super User
LOL...Saab even had a tool that sanded off the brake deposits.
it's definitely not semantics though, if you (and lots of people think this way) think that by putting cold water on a "hot" rotor, it's going to change shape - it can't, and won't
but by not once in a while actually getting on the brakes on most of these types of vehicles, you end up with deposits on the disks, and those deposits build high spots, and then you get the judder sensation. Bedding them back in solves it more times than not.
For some, switching to ceramic pads can be good, if they aren't heavy on the brakes from time to time. Ceramics have nowhere near the "mu" or the bite (feel), that other compounds do, but, they have very low dust, tend to be extremely quiet, and don't leave hese types of deposits with lighter use. But, they also can't take heat all that well, so for those who favor hard back road use, or do lots of heavier braking from higher speeds, they may quickly find the ceramics just aren't up to the task. All depends on the total blend of the compound, etc. Every brand can provide data on their particular pad compound as far as mu, temp range, etc.
but by not once in a while actually getting on the brakes on most of these types of vehicles, you end up with deposits on the disks, and those deposits build high spots, and then you get the judder sensation. Bedding them back in solves it more times than not.
For some, switching to ceramic pads can be good, if they aren't heavy on the brakes from time to time. Ceramics have nowhere near the "mu" or the bite (feel), that other compounds do, but, they have very low dust, tend to be extremely quiet, and don't leave hese types of deposits with lighter use. But, they also can't take heat all that well, so for those who favor hard back road use, or do lots of heavier braking from higher speeds, they may quickly find the ceramics just aren't up to the task. All depends on the total blend of the compound, etc. Every brand can provide data on their particular pad compound as far as mu, temp range, etc.
11-06-2018, 11:02 AM
#34
AudiWorld Super User
I use an impact wrench set on about as low as it will go.
I don't believe in torque limiting 'sticks' between the impact wrench and the socket, either. I've used impact wrench by reversing the deep well socket by hand until it clicks and then rotating the socket a little to start it correctly and then using the impact wrench...one trick is to hold the wheel against the hub with one hand while the air wrench tightens the fastener.
11-06-2018, 11:04 AM
#35
AudiWorld Super User
Or even deposits on the back of the wheel or on the hub flange.
Rust or other deposits on the hub flange can **** the wheel a bit. I'm not crazy about using a special rotary tool to clean the hub flange or the back of the wheel...just keep it clean. Antiseize on the hub flange helps to keep the wheel and the hub from becoming one through corrosion....
11-06-2018, 12:22 PM
#36
AudiWorld Super User
11-06-2018, 02:49 PM
#38
Club AutoUnion
03-23-2019, 11:16 AM
#39
AudiWorld Junior Member
Thread Starter
Update - Went in for my 40K (yes, I really do a lot of - mostly- highway miles) and the dealer not only said my brakes "look fine with 8mm all around", but they had said 7mm @ 30K... My pads are auto-magically reverse aging! Who knew!
Seriously, I am going to a trusted (word of mouth) brake shop when I finally need them done. Dealer pricing is outlandish and they obviously aren't smart enough to at least look in their records to see what BS they told me last time (or maybe they just don't give a $hit)..
Seriously, I am going to a trusted (word of mouth) brake shop when I finally need them done. Dealer pricing is outlandish and they obviously aren't smart enough to at least look in their records to see what BS they told me last time (or maybe they just don't give a $hit)..
03-23-2019, 03:31 PM
#40
AudiWorld Senior Member
Update - Went in for my 40K (yes, I really do a lot of - mostly- highway miles) and the dealer not only said my brakes "look fine with 8mm all around", but they had said 7mm @ 30K... My pads are auto-magically reverse aging! Who knew!
Seriously, I am going to a trusted (word of mouth) brake shop when I finally need them done. Dealer pricing is outlandish and they obviously aren't smart enough to at least look in their records to see what BS they told me last time (or maybe they just don't give a $hit)..
Seriously, I am going to a trusted (word of mouth) brake shop when I finally need them done. Dealer pricing is outlandish and they obviously aren't smart enough to at least look in their records to see what BS they told me last time (or maybe they just don't give a $hit)..