so i have a constand winding noise when i hit over 60km/ hr. its not just when i brake. its as i drive... this happened when i changed my rotors to the rotor pros rotors... i went with the black ones they have. i did not change my pads, my fluid is good i dont know what this may be... its starting to bug me now and i want to fix it.. anyone know the problem??

 

hmmmmmmmm. noise while driving... would you call it a "humming" noise? if so, you've got yourself a bad wheel bearing

 

Sparty it could also be a broken plastic engine shroud.

 

...

New rotors with USED pads?

It's your car telling you it's angry.

 

i kinda didn't read his whole post. just skimmed thru it

i do def agree w/ Z though. should always do pads w/ rotors

 

It should go away. Your pads and rotors (after wear and tear) never have a uniform and level surface. There are mountains and valleys in the rotors after 1000's of miles of braking and the pads form into these mountains and valleys creating a nice match (good for friction!) When you put on new rotors (nice flat surface) and keep your old pads the old mountains need to be worn off before the old pads can mate to the new rotors.

What's your pad %age look like? Either do some hard braking or do a quick pad job. Either way you'll need to break in the new pads (or try and "break in" your old ones).

By hard braking I mean doing straight 0-10mph acceleraions followed by ONE smooth (no skidding!) but firm brake application to a full stop, then 0-20, then 0-30 Etc. Until you reach eleventy billion mph.

 

red zman called it out. you should never never use old pads with brand new rotors. always buy new pads with new rotors so they can break in together. otherwise you destroy your rotor and it'll make funny sounds.

otherwise, the pads are likely breaking in and grinding the rotor. usually normal for the first few miles. the other scenario could be similar to mine. my pad looked ok but the rotor was grinding against the actual brake! had to replace the whole thing all because i didn't change the pads and get it checked out before...

luck.

 

so do u think its too late to get new pads.. or am i still gonna have noise now that i have used old pads on the new rotors for about 3000km

 

Mine made a howl for the longest time after replacing the brakes. Ended up the pads on the back of the rotor were sticking, I had to use a maul hammer to remove them lol. I filed down the contact areas so the pads would slip in easily and it's been problem free sense.