I purchased front Brembo rotors.
They came in a nice red boxes everybody likes. Cool!
Both of them were badly WARPED though.
Had to turn them both.
Good job Brembo!

 

where did u buy them from?
new or used?

 

Well he did say good job Brembo so I guess they are new.

 

That's getting interesting indeed. I recall you recenly asked if you should replace pads as well as rotors due to infamous judder. Just out of curiosity - how was it determined that your new rotors were warped? Did anybody bother to actually measure them? If you experienced judder with new rotors as well it doesn't mean that they're warped since judder can be caused by many factors and rotor geometry is only one of them. If you get the same problem soon don't cut rotors any more - just change pads, it should take care of the problem. When I was cutting my first set I found that conventional brake lathes used in local shops have less precision than rotors from the factory so they actually make rotor geometry worse that it was before. Simple experiment: next time you come to cut your rotors ask them to remount your rotor in different position and check for "warpage" again. In perfect world the position the rotor is mounted on lathe shouldn't matter if mounting hardware position rotor the same way no matter how you turn it. Well, it wasn't the case with mine - they could continue cutting them indefinitely. I was lucky that mechanic I was talking to was interested in results and he was very surprised himself. BTW, I was using torgue wrench all the time I rotated tires driving local tire shop guys nuts sometime and it didn't work for me at the end - I got my judder back after 5000 km. I still use torgue wrench out of habbit now but consider related effects as of second order, for now I stick to "bad pads" theory as the primary reason for judder in our cars.

 

Sorry for a delay with answer....
They were BRAND NEW!

 

It was very easy to figure out they were warped.
The old ones were making my steering wheel shimmy while braking over 65, but NEW Brembo - over 20!!!! Believe or not
When mechanic put them on lathe it was SO obvious they were warped
After they turned them - NO MORE PROBLEMS.

Thanks.

 

You see, I spent a lot of time trying to solve this problem for myself that it became sort of hobby as a result . First of all - "warped rotor" is common term used to identify steering wheel judder while braking, people usually don't bother go into much detail. Warped rotor itself doesn't cause judder right away because caliper has sliding pins which allow it "float" along the rotor. My rotors were showing warpage on the lathe but when I asked to remount it - just to rotate 90 degrees, they shown warpage in different place . After some time, like several thousands km down they can develop "thickness variation" because of excessive initial warpage or wobbling to be accurate. Only that thickness variation causes judder and can be cured by cutting rotor. I've found that in my case judder was caused by something else, because I couldn't find any excessive wobbling/thickness variation using micrometer. Using the same technique I found that cutting didn't make them truer, it actually made their geometry worse but as you noticed, it helped to eliminate judder for the next 4-5k km. I almost gave up and agree to cut them on regular basis and replace every three times. Last time, while replacing them with new set I also decided to replace pads to eliminate fading and found myself not having this problem for more than two years by now. With your new Brembo set something was wrong, it is hard to imagine that they made rotors with various thickness at the factory - did mechanic clean them from grease before installing, for example? If not, that alone would definetely cause that horrible judder you described. I also want to notice that ANY rotor being put on the lathe will show wobbling, even right after cutting, if you remount it in different position. I found cutting to be quite useless because of that.

 

Yes, he cleaned grease And he also told me, that brand new warped rotors is a common problem (because of the way they stock them in piles), believe it or not, he says it happens pretty often. He said, that I should've exchanged them....I said, yep, got them online - shipping will kill all profit. Forget it....cut!
I also tried to convince mechanics in 2 shops to use micrometer to position my new rotors and they all laugh at me...

I was told it's useless and turning them will fix the problem and IT DID.
I also was told that happens not only on Maxima, but on all other cars....
I don't know.....but I'm tired of it...just tired
If it happens again, I'll just let them cut my rotors - $20 and no more headaches.

 

Well, I was in similar situation: they laughed, cut, fixed and problem came back until I got really annoyed and got hold on micrometer. Then I went and installed my current stock rotors myself. I also measured their wobbling and couldn't believe my own eyes - it was less than 30mkm, no matter how I put them on the hub. Being paranoid about my brakes after I worn out the first set of R4S I measured them again - they were the same(!). I also tried to tighten one lug all the way on my torgue wrench (150lb-ft) and the rest to 30 and measured wobbling - I couldn't notice the difference, at least it was below my measurement abilities. The thing is that if rotor has surface with uneven friction coefficient cutting it will fix the problem but not for a long time. As I see it now we have to find suitable types of pads which don't leave as much build up on rotors. In your case with Brembo I can't say much but if the problem repeats itself within next 3-5k - try new pads without cutting rotors, because you already have them cut and their geometry should be good enough. Beside my R4S people here had good results with Raybestos Ceramic Quiet Stop and I'm sure there're others. Good luck!

 

Thank you

 

what brake pads you was using ?

 

Nissan OEM pads
(semimetallic)

 

bingo...

it was a lot of talks, what it's problem not in nissan rotors, but in their oem pads!


try smth like Raybestos Quiet Stop ( Pep boys ~50$) -ceramic.

 

Well....
What I noticed is that for some reason the surface of my front rotors, even a new ones after a while, are not silver, but covered with some kind of dark gray stuff....very thin layer
I looked at the other car rotors, for example BMW and they are silver and kind of glossy...which looks normal to me, but Nissan's not.....

 

Btw, Does anybody know what is the part number for Raybestos QUIET STOP for Maxima? and where I can purchase them, besides Pep Boys?

 

dont you think it is sh. material of oem pad on your rotor ?

sometimes its enough just put another pads without cuting rotor, and after few days vibrating is gone.

it's not mine expirience, but I was reading about that a lot of times here on .org . and i believe that.
I have same brembo blanks with Raybestos QS - no complains yet.

 

I can not find Raybestos QS online...
Anybody knows who sells them besides PepBoys?
Or any other good Ceramic pads (not overpriced though)....

Thanks.

 

I went to Sears yesterday. They have Raybestos QS available. But that is not the point. The point is Maxima's OEM pads are ceramic. That's what technician told me and showed me on his computer.
His words actually proved the result of my own research that Akebono ceramic is Maxima OEM pad.


Max_5gen,
Warpage because of over tightened lug nuts occurs only when rotors get overheated. So, measuring the difference (tighten to 150lb) with micrometer on cold rotors does not make much sense. You not strong enough to warp cold thick steel...

Thanks.

 

Here is the link for Maxima's brake pads:
http://www.akebonobrakes.com/

 

But our OEM pads seem to put out a lot of brake dust. I thought that ceramic pads are supposed to put out less dust.
How are the Raybestos in terms of brake dust?

Jason

 

I had the same EXACT thing happen to me with brembo blanks (on a different car, a Talon TSi). They were never touched for x-drilling or slotting, brand-spanking-new, I just installed as-is and they were lumpy out of the box.

Then they rusted up so bad, they were ugly as sin.

brembo blanks suck.

 

My front OEM pads DO NOT produce dust.
The rear one is dusty though.....