I changed the pads and rotors on my 03 less then 3,000 miles ago and one screeches like metal on metal it seems like it's just the front left one that makes noise. Any ideas what it could be? And it does it all the time not just cold. I used ceramic pads ( thermo quiets )

 

Couple things. Grease the caliper bolts so the caliper can slide on them easily. Replace the hardware kits (metal clips that hold the pads in place). And use anti-squeal on the back side of the pads.

Was one side in worse condition than the other? If the piston is sticking it will cause the pad to drag on the rotor. That would require caliper replacement.

 

did you bend the wear indicator when installing new pads ?

 

I don't know. I didn't install the front ones I did the back ones. But I doubt the mechanic bent them.

 

I do not think the bolts were greased or any anti squeal put on the pads... Also there are some lines like marks on the rotor that look like this but not nearly as bad.

 

You may want to have the rotors resurfaced or replaced also.

 

the new one? That picture is of one of the old ones

 

Sorry. Didn't realize you had new rotors. Ceramic pads will cause some scratching on the new rotors. Be sure to break them in properly. The procedure should have been included with the rotors. It's just a series of slow then moderate stops to heat cycle the rotors.

 

I've noticed a trend in the last year or so with many of the duralast and wearever semi-metalics. If you don't use squeal grease on the back of the pads they will chirp and squeal.

It use to be hit or miss but now if you don't use the grease, you're almost guaranteed to squeal at some point in the life of the pads. It could be days weeks or even months before the squealing start and sometimes it even goes away after it's warn past the tolerances of the circumstance that caused it.

Also many people, even pros forget sometimes but you always have to clean the new rotors with brake or carb cleaner before you put them on. If YOU didn't, pull the calipers, do it and them use a green or red monsters to scuff the rotors and pads. ..making sure to not leave any scratch pad material behind before reassembly.


EDIT: One more thing, I have seen brand new rotors from auto parts stores be warped a few thousandths right out of the box. So everyone should be slightly cautious of that. Some would say, it's all about if the rotors are stored Upright or laying face down. I don't know what the truth really is but I think a quality rotor should be able to withstand the volume force of laying face down without warping.

 

I watched my brother hit them all with brake clean so i know thats not the issue i think its not greasing them that might be causing it but ill take pictures of the rotors so you can see the wear