Brakes replacement
06-19-2018, 03:25 PM
#21
AudiWorld Senior Member
06-19-2018, 03:27 PM
#22
AudiWorld Senior Member
shokhead Shame on you using those metric numbers, sounds like Communism to me ! You're good down to 3 mm and if wear is even then down to 2.The assumption is that you don't want to chew into your rotors cause they're good for 2 pad changes at least under "normal" conditions.
06-20-2018, 02:56 PM
#24
AudiWorld Super User
06-22-2018, 02:43 PM
#25
Just had my front brakes and rotors replaced and the first impression is that they feel spongy and with a fair amount of travel. I guess I’ll have to bed them in before having them purged right? Mechanic said it’s normal and that I’ll start to feel them better after a few hundred miles.
Is there a recommended bed in procedure for original Audi brakes?
Thanks!
Is there a recommended bed in procedure for original Audi brakes?
Thanks!
06-22-2018, 03:05 PM
#26
AudiWorld Senior Member
Bed-in procedure is similar for most pads.Try this taken from a "Porterfield" website:
From a speed of about 60mph, gently apply the brakes to slow the car down to about 45mph, then accelerate back up to 60mph and repeat. Do this about four or five times to bring the brakes up to operating temperature. This prevents you from thermally shocking the rotors and pads in the next steps.
Make a series of eight near-stops from 60 to about 10 mph. Do it HARD by pressing on the brakes firmly, just shy of locking the wheels or engaging ABS. At the end of each slowdown, immediately accelerate back to 60mph. DO NOT COME TO A COMPLETE STOP! (Note: With less aggressive street pads and/or stock brake calipers, you may need to do this fewer times. If your pedal gets soft or you feel the brakes going away, then you've done enough. Proceed to the next step.)
During this process, you must not come to a complete stop because you will transfer (imprint) pad material onto the hot rotors, which can lead to vibration, uneven braking, and could even ruin the rotors.
Depending on the pads you are using, the brakes may begin to fade slightly after the 7th or 8th near-stop. This fade will stabilize, but not completely go away until the brakes have fully cooled. A bad smell from the brakes, and even some smoke, is normal.
After the 8th near-stop, accelerate back up to speed and drive around for as long as possible without using the brakes. The brakes will need at least 10 minutes to cool down. Obviously, it's OK to use the brakes to avoid an accident, but try to minimize their use until they have cooled.
From a speed of about 60mph, gently apply the brakes to slow the car down to about 45mph, then accelerate back up to 60mph and repeat. Do this about four or five times to bring the brakes up to operating temperature. This prevents you from thermally shocking the rotors and pads in the next steps.
Make a series of eight near-stops from 60 to about 10 mph. Do it HARD by pressing on the brakes firmly, just shy of locking the wheels or engaging ABS. At the end of each slowdown, immediately accelerate back to 60mph. DO NOT COME TO A COMPLETE STOP! (Note: With less aggressive street pads and/or stock brake calipers, you may need to do this fewer times. If your pedal gets soft or you feel the brakes going away, then you've done enough. Proceed to the next step.)
During this process, you must not come to a complete stop because you will transfer (imprint) pad material onto the hot rotors, which can lead to vibration, uneven braking, and could even ruin the rotors.
Depending on the pads you are using, the brakes may begin to fade slightly after the 7th or 8th near-stop. This fade will stabilize, but not completely go away until the brakes have fully cooled. A bad smell from the brakes, and even some smoke, is normal.
After the 8th near-stop, accelerate back up to speed and drive around for as long as possible without using the brakes. The brakes will need at least 10 minutes to cool down. Obviously, it's OK to use the brakes to avoid an accident, but try to minimize their use until they have cooled.
06-22-2018, 03:11 PM
#27
Thanks!
06-22-2018, 04:20 PM
#28
AudiWorld Super User
Just had my front brakes and rotors replaced and the first impression is that they feel spongy and with a fair amount of travel. I guess I’ll have to bed them in before having them purged right? Mechanic said it’s normal and that I’ll start to feel them better after a few hundred miles.
Is there a recommended bed in procedure for original Audi brakes?
Thanks!
Is there a recommended bed in procedure for original Audi brakes?
Thanks!
Last edited by Bob Petruska; 06-22-2018 at 04:32 PM.
06-22-2018, 05:23 PM
#29
Well, back from this bedding thing, could only speed up to 50mph because of speed limits in my area. Second try caused some burning smell and that was all, I don’t know if it’s the placebo effect or it actually worked but I don’t feel brakes that spongy now, still not nearly as short and hard bite as they used to be though. I’ll now drive gentle and don’t stress the brakes for a few days since by the end of next week I’ve got to drive 800 miles.
Thank you all for your feedback.
Thank you all for your feedback.
06-22-2018, 06:02 PM
#30
AudiWorld Super User
Well, back from this bedding thing, could only speed up to 50mph because of speed limits in my area. Second try caused some burning smell and that was all, I don’t know if it’s the placebo effect or it actually worked but I don’t feel brakes that spongy now, still not nearly as short and hard bite as they used to be though. I’ll now drive gentle and don’t stress the brakes for a few days since by the end of next week I’ve got to drive 800 miles.
Thank you all for your feedback.
Thank you all for your feedback.