what causes this??

MMamdouh · Post by **MMamdouh** » Thu Jan 11, 2007 9:11 pm

what causes rotors to crack like this?? those came out of the 2.0 Nubira.

MMamdouh

Daniel · Post by **Daniel** » Thu Jan 11, 2007 9:22 pm

Worn beyond minimal thickness?

Daniel

Slammed · Post by **Slammed** » Thu Jan 11, 2007 10:13 pm

High Heat would cause that

kinkyllama · Post by **kinkyllama** » Thu Jan 11, 2007 10:28 pm

Slammed wrote:High Heat would cause that

Probably not before it warps.

Has the owner had a problem with warping?

I've warped rotors about 10 times...several times too bad to drive at all and haven't had any cracking ever.

Slammed · Post by **Slammed** » Fri Jan 12, 2007 1:30 am

How about a big pothole LOL

GsiTurbo · Post by **GsiTurbo** » Fri Jan 12, 2007 5:39 am

This could be a number of factors, bot most likely poor quality, overheating and heavy braking...

lanowoo · Post by **lanowoo** » Fri Jan 12, 2007 7:02 am

having really good brake pads and a heavy brake foot. Someone was going really fast and used what it looks like both feet really fast into the brake pedal. Thats the only time i have seen that happen no warping, cause brake was not depressed long enough to warp, so it was brittleand cracked under force of it. Thats my guess.

Joso · Post by **Joso** » Fri Jan 12, 2007 7:15 am

It would've been a lot worse with drilled rotors.

MMamdouh · Post by **MMamdouh** » Fri Jan 12, 2007 12:54 pm

those were bembo rotors and the way i see it they are way off beeing too thin... owner replaced them rotors because he was having "shudder at braking" symptom which indecates that they are wrapped as well.

i recon the 2.0 and fast driving got a big share of doing that but why should the braking system be too weak to handle the 2.0 engine? the only difference i saw between the 1.6 and 2.0 nubira was the booster.

maybe the period of time that this car was turboed had an effect too... the car was almost unstoppable when you go fast as hell and get carried away with the boost, i recon the OEM braking system is simply helpless trying to stop a 197 WHP car and that should put so much strain on everything including the rotors.

MMamdouh

Audacity Racing · Post by **Audacity Racing** » Fri Jan 12, 2007 6:17 pm

Stress failures due to...

High Heat ----- Low cool time (i.e. puddle or car wash)

High Heat: Hot spots in the metal due to casting characteristics

Low heat: Pads not warm enough tot ake a good bite, so driver inadvertantly steps on pedal harder and causes stress fracture

High heat: warping at low rotor temp, high pad temp resulting in surface crack.

In reality, if you did a dye check on any rotor that's been broken in, it would be riddled with stress cracks, it's just a matter of enviroment and situation as to whetehr or not the cracks get large enough to be seen or matter.