kclmax2k1

Hi,
The reason I ask this weird question is because i got some "clunking" noise after replacing rear pads and rotors.
I went to Belle tire to have them check my rear brake.
They said my brake works fine.
The noise may because I didn't turn the news rotor before using them.
They ask $60 to turned both rear rotors and I didn't buy it.
I never heard about turning new rotors.
Are they right?

NmexMAX

iTrader: (22)

I've never turned mine when I bought them new, on my third set now. I get charged 14 dollars for both to refinish my two fronts at Checker.

imported_JIC_A33

i put new very agressive pads on my 02 in the front, and didnt turn them. Car runs fine, no warping, or anything. all the years i have been working on cars, i never turned the rotors. all the rotors were in good shape though...

wngan9447

iTrader: (4)

You only turn the rotors when they are glazed... new rotors should be perfect, unless they are plated with some material to prevent rusting. They you will need to drive around for a bit to get the top layer off... I bought mine zinc plated and it scared the living daylights out of me when I went to brake and it took a sec to really grab on.. I kept on checking the calipers to make sure they were tight, and they were.. i was going crazy

brianc

When installing new rotors you should always wipe both sides down carefully with brake clean to remove the packing protective coating. If not glazed pads may result with either careful sanding or new pads as the repair.
Turning new rotors.....seek a new mechanic that one is an idiot!
Turning rotors is only a temporary fix that generally will result in the original problem reoccuring since you have now decreased the rotors abilty to dissipate heat by changing the characteristics of the rotor.
As for the clunking sound.
Make sure the calipers are properly tightened and the pads correctly installed with the anti-squeal plates/shims.
Were your lug nutz tight if not it may have been the rim moving on the studs. Also not a good thing.

Zero Deuce SE

As long as you don't cut the metal to below the minimum thickness, the rotor will be fine. Car rotors are usually much thinner than truck rotors so there isn't much turning that you can do anyway.

FusionAcid

iTrader: (1)

The answer is no. I had 4 brembo blanks that were zinc coated. Those things took like 1 hour to peel the zinc off. First 5 minutes i barely couldn't stop my car. After breaking them in + 2 days, they were normal. You only wanna turn ur rotors if they are uneven and the minimum thickness of the rotor after turning is above the minimum required thickness to drive.