StopTech Rotors rubbing
 

Installed my Stoptech rear slotted/drilled rear rotors yesterday. there is an intermittent scrapping/rubbing sound coming from the left side. I can especially hear it when driving with the window down and close to the center island or in an alley.
Is it because the pads need to wear to the new rotor, I have 8300 miles on the old ones, or is it possible the rotor is warped or bent?? the right side does it slightly but not nearly as bad. When I installed the fronts I never had this issue, there was only about 3000 miles on the car though. Any thoughts, suggestions appreciated :tup:

Yes, it usually takes a while for the pads to seat to the new rotors. The noise you hear is excess grooves in your pads being worn off by the new rotors , as they aren't fully seated. No need for worries.

did you follow their recommended bed in procedures?

StopTech : Balanced Brake Upgrades

You have to drive for 20 or 30 miles to wear off the coating before following the bed in procedure.

The extra noise could be from the drilled rotors (which I don't recommend to anyone) or it could be from high spots on the pads if your old rotors weren't perfectly flat.

I wasn't sure about that process, because the pads were not new, but I see now that they still recommend it. I will give it a try :tup:

Well, I driven about 50 miles now, so I will try it. thanks :tup:

good luck, let us know if it helps

Ok, did the bedding in procedure, have about 100+ miles on them so far and still have the scrapping sound. If it's high spots on the pads, how long before they start to seat on the rotors?? Or should I just replace the pads? there is about 8300 miles on these ones, they are the stock pads.

couldn't hurt to try a different set of pads... always helpful to have an extra set anyways... give it a shot... try another brand and compound as well

Yeah, driving home to night, the lite scrapping sound has now turned into a chirp.
chirp, chirp, chirp, chirp, chirp, I think I have a hamster wheel or birds in my brakes :rofl2:

Ok, seriously, I'm a bit concerned because I'm taking an 800+ miles trip on Friday.
So, I either try new pads or put the stock rotors back on, or hope that the pads seat to the rotor during the trip. What are the chances that the rotor surface is not machined correctly?

Also, if I change out the pads in the rear, should I change the front too? or is it ok to run different brands front and rear?

ok to run different brands IMO... and i'd guess 90% likely this will work itself out... remind us, which pads are you running ? OEM pads ? were they new at time of install of rotors ?

Ok, cool, I was thinking of trying the Hawks, any recommendations?
Pretty much street use with an occasional canyon run once a month.

Yes, I have OEM pads on now, there was about 8300 miles on them when I installed the rear rotors.

my recommendation is OEM recommended pads unless you plan to track it... this may be unpopular with some ppl, but until you start having fade issues, no reason to upgrade the pads... and some of the higher friction pads have downside too, like more dust, longer to build up heat and perform, etc

If the bedding in procedure didn't help matters, you may have some debris between the pads and rotors. Perhaps a rock or something of the like.

Did you follow my installation procedure? It almost sounds like your rotor isn't perfectly flat against the hub.