Loud brakes after new pads?

[MikeyIs4Dcats]

I put new pads on the rear calipers of our car a while back, and when I brake pulling out of the driveway or in other low-speed situations, I can hear a rubbing/grinding sound. These are semi-metallic pads, and I used a pad grease. The shims from the OEM pads didn't seem to want to fit the new pads, which had a thicker plate on them, so I elft the OEM shims off the replacement pads.

The rotors were a little grooved but due to time constraints and weather, I didn't undertake that job.

Could leaving the shims out be the issue? Could it be the rotors? I know semi-metallic pads can be a little louder, but this seems to be a little louder on the passenger side, and is pretty loud so I'm a little concerned it's not normal.

 

[SparkyJJO]

I assume you put the pad grease on the backs of the pads not the braking surface of the pads

New pads need broken in. My pads rubbed a little at first until I broke them in.

 

[MikeyIs4Dcats]

Originally posted by: SparkyJJO
I assume you put the pad grease on the backs of the pads not the braking surface of the pads

New pads need broken in. My pads rubbed a little at first until I broke them in.

This has been a few weeks...

 

[Jahee]

You probably didn't notice it before.. I've always had this on my car, and considering the forces and materials involved, i don't think its anything to worry about..

 

[LOUISSSSS]

with new pads and/or rotors, you should always bed them in, look it up in google

 

[StageLeft]

FWIW I changed rear pads on my car once and did not touch the rotors and it truly took about 10k miles before the high pitched squeal would go away while braking. It never really bugged me and it did ultimately go away. Pads were organic. I'm surprised the shims would not go on--are you sure the calipers were compressed in fully? In any case, you can also put in anti-squeal compound, but if otherwise the car is working fine and rolling smoothly it might not hurt to just leave them and see if they get better.

 

[MikeyIs4Dcats]

alright, I'll try bedding them.

 

[thecritic]

You installed them correctly-- aftermarket pads already come with shims and you should NOT reuse the original shims, otherwise, you might cause the pads to drag. Synthetic caliper grease or Molykote77 would be the correct compound to use for noise reduction on the pad shim, not the tacky anti-squeal stuff. The anti-squeal stuff is made for pads that do not contain shims.

I think your problem is with the rotors. If you are not using the same brand/model/type brand pad that you were previously using, it's best to resurface or replace the rotors. The grooves and the old material left on there is probably contributing to your noise problem. Also, you need to clean and replace any damaged hardware, such as the abutment clips.