Kengthao91

Hey guys i just install some drill Password JDM Rotors prob a month ago, and most of the time when i let the car roll and slightly brake, the brake keeps make this grinding noise.... i don't really know why its doing that..... is it because of my pads? I'm using duraflex pads from auto zone or what? cuz on my stock rotor, everything seems fine when driving...... thanks for all the suggestions.....

s2cho

Your rotors formed your pads into a "grove" if you know what im saying. this happens if you dont machine/ flip your rotors when you put on new pads. so your new rotors are perfectly "straight" while your pads arent. if you put a couple 100 miles on it, it should go away.

example
"Pad"
>
>
>
>

old rotor
<
<
<
<

new rotor
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|
|
|

mrbond413

Is it a constant grind or does it only scrape your rotor in a certain spot when it rotates. 2 of mine scraped on a certain spot so i had to replace the wheel bearings.

Kengthao91

It just kinda grind not scrape I hope

Kengthao91

Oh ok thanks, I hope after 100 miles or so it'll be ok.....

freetors

If it's more like a low pitched groan at very low speeds it's not abnormal.

zeroptzero

slotted rotors seem to make more noise at certain times, are the password's slotted and drilled ?

Kengthao91

Yeah it's just like you say.... It makes a low pitch groan

Kengthao91

Both

zeroptzero

That may be normal then. I first put drilled rotors on the front and they were quiet, and then I put on some drilled and slotted rotors on the rear and the brake system got noisier after that, with low pitch groaning.