new brake sound

I just installed new rotors and pads on the front of my 2000 Sonata and
everything was fine the first day. The following day I noticed a slight
metallic rubbing sound, mostly from the front driver side wheel. I took
it back to my mechanic, he test drove it, and he said I should give it
time and allow the pads to wear evenly and it should go away. Is this
true? Do new pads and rotors need a "breaking in" time that is
accompanied by some noise?

The brakes seem to work fine, no problems there. Its just this sound
that has me concerned.

Thanks

 

Yes, although with all new parts, it shouldn't take long. If it's still
making noise after a week of use, I'd bring it back and insist on having
it examined.

 

Thanks for the quick reply. Today is the first day after installation
and my mechanic said after a couple of days, bring it in if it
persists.
Thanks

 

Another question, if I do have to take it back after a few days, what
may be causing this noise as its definitely the new parts. My mechanic
also said a possibility was a cleaning product he used to clean the
grease off the new rotors. This compound may still be on the rotors a
bit and causing the noise? Ever hear of this?

 

If the noise occurs when you're not braking, the backing plate may have
been bent during servicing and is now rubbing the rotor.

If it occurs when braking, it's possible your mechanic is correct. I
haven't heard of any issues with chemicals causing this, but I suppose
it's possible that it could be due to some interaction with the rotor.
Some rotors come with a painted surface and make a similar noise until the
paint wears off. It's also possible it's a noise characteristic of the
brake pad material.

 

thanks for the reply hyundaitech. The noise only occurs during braking.