4.2 Rear disc brakes
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Joined: Oct 2003
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4.2 Rear disc brakes
I've done many searches on disc brakes, and am aware of this need to "break in" new rotors. My problem is that I did not become aware of this technique until after my second set of rotors went on at 56,000. I'm now at 64,000 and feel the dreaded pulse from the rears again (I know this because it happens when I pull the parking brake).
Anyway, I tried to get Audi to replace under warrenty, but they didn't feel the pulsing. Whatever. It's there and it's annoying. After a lenthy chat with the Service Technician, he "admits" the Audi rotors often need to be replaced after 15,000 miles and suggest I go with a heavier rotor (the 4.2 already has a beefier rotor). He also says that the "break in" that I mentioned has no effect.
One more thing on the break in technique - if one is to try this, just where do you find the space to do multiple 60-5 heavy stops???
At this point, with 8-9,000 miles on these rotors, should I try to have them turned? Should I try the break-in technique at this point?
Finally, why the rear and not the fronts? Is it just me (and,no, I'm not leaving the parking brake on).
Any suggestion on techniques, rotors, brake pads or other is appreciated.
Anyway, I tried to get Audi to replace under warrenty, but they didn't feel the pulsing. Whatever. It's there and it's annoying. After a lenthy chat with the Service Technician, he "admits" the Audi rotors often need to be replaced after 15,000 miles and suggest I go with a heavier rotor (the 4.2 already has a beefier rotor). He also says that the "break in" that I mentioned has no effect.
One more thing on the break in technique - if one is to try this, just where do you find the space to do multiple 60-5 heavy stops???
At this point, with 8-9,000 miles on these rotors, should I try to have them turned? Should I try the break-in technique at this point?
Finally, why the rear and not the fronts? Is it just me (and,no, I'm not leaving the parking brake on).
Any suggestion on techniques, rotors, brake pads or other is appreciated.
AudiWorld Senior Member
Joined: Feb 2001
Posts: 990
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From: Denver, CO
I did my break in at an empty High School Parking Lot
No speed bumps. I got a used A6 and feel the pulse too. Since it had new pads I tried the break in to at least bed the pads but the rotors won't fix themselves without being turned. I am going the route of having the rotors turned which should solve the problem.
You might give a call to Dave Zeckhausen at Zeckhausen Racing about brakes. He will give you all the information you need.<ul><li><a href="http://www.zeckhausenracing.com/">Dave</a></li></ul>
You might give a call to Dave Zeckhausen at Zeckhausen Racing about brakes. He will give you all the information you need.<ul><li><a href="http://www.zeckhausenracing.com/">Dave</a></li></ul>
AudiWorld Super User
Joined: Jan 2003
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Turning the rotors will only make them more susceptable to warping..
since you are reducing the mass even more. Perhaps first you might try a few spirited stops to "burn"off some pad material that may have been transferred during your use of parking brake while hot.. thus the rears only..
Audi dosent want you to know it, but they made a mistake when designing the brakes for the 6 series by making them too small.. this is what causes most of the overheating/sticking/warping we see. They rectified this in the new 6 series by putting substantially beefier brakes on them...
Audi dosent want you to know it, but they made a mistake when designing the brakes for the 6 series by making them too small.. this is what causes most of the overheating/sticking/warping we see. They rectified this in the new 6 series by putting substantially beefier brakes on them...
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