Rotors Keep Warping!!! HELP!!

[FormulaMMM]

Originally Posted by EricVR4

The judder is only while braking between 40-50mph, but no I haven't tried road force balancing the wheels/tires (yet).

Worth a shot, I'd say. If out of balance somewhat strange that it'd only happen under braking, but maybe just more perceptible then. This is a common out of balance speed range and our cars are very sensitive in this area.

Tell the shop you need maximum precision and you'll buy the tech lunch if he solves.

[EricVR4]

Originally Posted by FormulaMMM

Worth a shot, I'd say. If out of balance somewhat strange that it'd only happen under braking, but maybe just more perceptible then. This is a common out of balance speed range and our cars are very sensitive in this area.

Tell the shop you need maximum precision and you'll buy the tech lunch if he solves.

Noted!

It's just odd that whenever they replace the rotors/pads, everything is fine and perfectly smooth for anywhere between 500-1,500 miles. Seems like if something was out of balance or off, it would be there no matter what. But I'm far from an expert mechanic so who knows.

[FormulaMMM]

Originally Posted by EricVR4

Noted!

It's just odd that whenever they replace the rotors/pads, everything is fine and perfectly smooth for anywhere between 500-1,500 miles. Seems like if something was out of balance or off, it would be there no matter what. But I'm far from an expert mechanic so who knows.

Agree, but it's also odd that a brake deposit type of issue would only be perceived in a very specific speed range. And if brake components have been swapped out in full, then I'd want to rule out the basics like balancing. I have had wheels slightly out of balance and vibration in the exact speed range you indicate.

I'm not up to speed on this whole thread and your experience -- you've tried a bedding procedure? https://www.zeckhausen.com/catalog/i...Path=6446_6443

[EricVR4]

Originally Posted by FormulaMMM

Agree, but it's also odd that a brake deposit type of issue would only be perceived in a very specific speed range. And if brake components have been swapped out in full, then I'd want to rule out the basics like balancing. I have had wheels slightly out of balance and vibration in the exact speed range you indicate.

I'm not up to speed on this whole thread and your experience -- you've tried a bedding procedure? https://www.zeckhausen.com/catalog/i...Path=6446_6443

Also true. Nothing about this entire scenario makes sense so I definitely can't rule anything out.

I have tried bedding them in yeah when they've replaced them initially each time. Once the judder came back, I'd try braking hard while cold to see if I could clean off any deposits but it didn't work with the stock pads. I swapped out for some Akebono ceramic pads a few months back and the judder got less pronounced but still there between 40-50.

I can feel some SLIGHT pulsing at lower speeds (<10mph) while braking but it's so faint that it's hard to tell if it's the pads or just the road. My next step was to buy some DS1.11's and throw them on for a few days to really clean up the rotors and see if the problem goes away.

Sounds like I'm adding road force balancing to my list now too though.

[FormulaMMM]

Originally Posted by EricVR4

Also true. Nothing about this entire scenario makes sense so I definitely can't rule anything out.

I have tried bedding them in yeah when they've replaced them initially each time. Once the judder came back, I'd try braking hard while cold to see if I could clean off any deposits but it didn't work with the stock pads. I swapped out for some Akebono ceramic pads a few months back and the judder got less pronounced but still there between 40-50.

I can feel some SLIGHT pulsing at lower speeds (<10mph) while braking but it's so faint that it's hard to tell if it's the pads or just the road. My next step was to buy some DS1.11's and throw them on for a few days to really clean up the rotors and see if the problem goes away.

Sounds like I'm adding road force balancing to my list now too though.

Does sound like a brake issue. Check out from post #658 here. Sandpaper might be worth a shot, cheap! https://f80.bimmerpost.com/forums/sh...659397&page=30

And here's subsequent feedback from the same member on the ferodos https://f80.bimmerpost.com/forums/sh...&postcount=832

good luck. Brake and vibration issues suck.

[EricVR4]

Originally Posted by FormulaMMM

Does sound like a brake issue. Check out from post #658 here. Sandpaper might be worth a shot, cheap! https://f80.bimmerpost.com/forums/sh...659397&page=30

And here's subsequent feedback from the same member on the ferodos https://f80.bimmerpost.com/forums/sh...&postcount=832

good luck. Brake and vibration issues suck.

I saw the sandpaper thing yeah, guess I'll give that a try as I'm swapping on the Ferodos!

I actually PM'ed swagon the other day asking if his issues ever came back after throwing the Ferodo's on. So far so good for him so fingers crossed that fixes mine as well.

[LaxIan55]

Originally Posted by EricVR4

I saw the sandpaper thing yeah, guess I'll give that a try as I'm swapping on the Ferodos!

I actually PM'ed swagon the other day asking if his issues ever came back after throwing the Ferodo's on. So far so good for him so fingers crossed that fixes mine as well.

I also am having this same issue as everyone. In august BMW replaced all four corners and the issue was gone but now about 2,500 miles later the issue is back and my warranty expired.

I swapped to PowerStop Carbon Fiber pads a month ago and stripped the rotors down with a nylon wheel and it still juddered. I just replaced my driver side hub on Friday because it felt like there was a little bit of play in it and it feels exactly the same.

I’m curious if anyone had a caliper rebuilt or replaced through this? I wonder if they are dragging and causing the rotor to take on additional heat and potentially warp.

[EricVR4]

Originally Posted by LaxIan55

I also am having this same issue as everyone. In august BMW replaced all four corners and the issue was gone but now about 2,500 miles later the issue is back and my warranty expired.

I swapped to PowerStop Carbon Fiber pads a month ago and stripped the rotors down with a nylon wheel and it still juddered. I just replaced my driver side hub on Friday because it felt like there was a little bit of play in it and it feels exactly the same.

I’m curious if anyone had a caliper rebuilt or replaced through this? I wonder if they are dragging and causing the rotor to take on additional heat and potentially warp.

michaelalex17 had his calipers rebuilt among other things and I believe his judder is still gone (I hope anyway).

[jcbertin]

So got back the F80 after the 3rd visit. They replaced the front left wheel (competition wheel) as they said it wasn’t mating true/flat to the hub.

New rotors and pads again as well.

500 miles in and things feel good ...fingers crossed.

Snow is down and planning to take it in for a tune, downpipes, intake next. Assuming it makes it a few thousand miles with the braking shudder gone.

We will see...

[EricVR4]

Originally Posted by jcbertin

So got back the F80 after the 3rd visit. They replaced the front left wheel (competition wheel) as they said it wasn’t mating true/flat to the hub.

New rotors and pads again as well.

500 miles in and things feel good ...fingers crossed.

Snow is down and planning to take it in for a tune, downpipes, intake next. Assuming it makes it a few thousand miles with the braking shudder gone.

We will see...

Any idea how they were able to determine that the wheel wasn't mating to the hub fully?

A few of us have tossed around that idea as well because we all have re-finished wheels (previous owner had mine done on the passenger side...which is odd because he had the wheel/tire warranty from BMW so I figured they would've just replaced the wheels).

I haven't really been interested in spending the money on new wheels/tires but maybe I need to

[EricVR4]

Welp, I guess I'll let y'all know if it's my wheels. I ordered a set of Richland Forged GT4's today (should be here in February). I'd been debating on wheels since I got the car 15 months ago due to the 2 re-finished ones being slightly lighter/brighter than the 2 originals and it bothered me daily.

So between those and the DS1.11's let's hope it fixes the problem.

I have no idea how it's possible to both hate and love something so much but this car has found a way

[tbonefitz]

Hi guys, I am mostly fed up with this very problem. I've read all 8 pages of this thread along with the other parallel thread about OEM brake rotors. I've just been enduring the juddering until my brakes were about ready to be replaced, and I'm there now. It sounds like it could be the pads, but it also could be the rotors, but it also could be the rims, or the hub bearing, or . . . no one really has a solution. So, before I go out and start chasing down this same rabbit hole, I'd love some feedback from EricVR4, Michaelalex17, and jcbertin. All you guys had your wheels/rotors/pads done in mid December. How is it all holding up?

Thanks so much for being so incredibly thorough in your posts. After you guys report back, I'll scrub all the old posts and see if I can make a good summary.

[EricVR4]

I'm still waiting on my new wheels (should be the end of February now) and I'm still using the ceramic pads. I'm going to wait to scrub the rotors with track pads once I throw the new wheels on, then switch back to the ceramics.

So I'm several thousand miles on my 4th set of front rotors along with 2 new front wheel hubs but I still get a judder between 40-55mph. What's odd is that when it's fairly cold (sub 40 degrees), the judder is nearly non-existent when I first start driving. Then once things heat up, the judder is fully back.

If the new wheels/rotor cleaning doesn't fix it then I have no idea what to do

[tbonefitz]

Thanks for the update. I'm going to spend some quality time with the last 8 pages this weekend to see if I can get any kind of consistency with pads/rotors/ the works. Have you tried turning off the traction control yet?

[EricVR4]

Originally Posted by tbonefitz

Thanks for the update. I'm going to spend some quality time with the last 8 pages this weekend to see if I can get any kind of consistency with pads/rotors/ the works. Have you tried turning off the traction control yet?

I drove around with DSC completely off for a few weeks yeah and I didn't notice too much of a difference. Sometimes I did but I couldn't tell if it was a mental/placebo thing or not.

[tbonefitz]

I'm still wondering if the DSC has something to do with it. Aftermarket disks and pads that don't have problems on other cars should work on our cars too, right? I wonder if the DSC drags the brakes just enough that it keeps them just warm enough constantly that a regular stop - or ONE hard stop from 70 will heat the brakes too much? I wonder if those BootMod3 programmers can look at the brake programming for us?

[tbonefitz]

Hey, I had a thought. How many of us are manual transmission, and how many are paddle shifted? Would everyone (who is still participating) please post their transmission too?

[cheveux]

Guys.... just change the wheel bearings
you're welcome

[tbonefitz]

Cheveux, did you change all 4? The backs are quite a royal pain in the ass, BMW did one of them for me already. I'd rather not have to do the other one if I don't absolutely have to, and mine is out of warranty.

Also, I emailed the bootmod3 guys to see if they ever did any work on the DSC and brakes. Answer is no, and the programmer didn't have any good advice other than "I switched mine to carbon brakes, and that fixed it"

[EricVR4]

Originally Posted by cheveux

Guys.... just change the wheel bearings
you're welcome

BMW replaced mine and it didn't fix the problem unfortunately.

@tbonefitz I have a DCT

[cheveux]

Originally Posted by tbonefitz

Cheveux, did you change all 4? The backs are quite a royal pain in the ass, BMW did one of them for me already. I'd rather not have to do the other one if I don't absolutely have to, and mine is out of warranty.

Also, I emailed the bootmod3 guys to see if they ever did any work on the DSC and brakes. Answer is no, and the programmer didn't have any good advice other than "I switched mine to carbon brakes, and that fixed it"

Originally Posted by EricVR4

BMW replaced mine and it didn't fix the problem unfortunately.

@tbonefitz I have a DCT

Sometimes it's hard to figure if the problem is in the front or rear axis.
I advise you to change the 4. But the ones in front are mainly the most important to change. Especially when they start making metallic noise when turning at low speeds or parking. The temperature of the bearings also causes the car to shake more or less when braking.
You can find the front ones from a brand called OPTIMAL with this EAN:4058787157055

[LaxIan55]

Originally Posted by cheveux

Sometimes it's hard to figure if the problem is in the front or rear axis.
I advise you to change the 4. But the ones in front are mainly the most important to change. Especially when they start making metallic noise when turning at low speeds or parking. The temperature of the bearings also causes the car to shake more or less when braking.
You can find the front ones from a brand called OPTIMAL with this EAN:4058787157055

I changed my fronts and it didn’t help at all. Just an expensive project to still have the shakes.