I just left my friends shop where we installed cobalt gt-sport pads on my 4-pot wilwood kit that I got from Spugens GB. There are two bolts that hold the caliper in place I guess, and at the end of each bolt there are three washer looking shims, he called them. He had never seen shims on a brake kit and didnt know their function, but we replaced them the same way we took them off. Now, under braking the car pulls right and the left front pad rubs the rotor even when I'm not touching the pedal. He said it might be that the shims are there in order to adjust for different width pads. What's going on, whad'yall think?
Jonathan

 

did you bleed the brakes properly?

 

Sound like the left front caliper is improperly shimmed...With the caliper installed, push the pads and pistons all the way back. You should have equal spaces between the rotor and the brake pads. I agree with s2k fever that there could be air in the system as well...

 

We didn't bleed the brakes at all. I thought you needed to bleed just when changing fluid, which we didn't do...Is that bad??

 

I'm assuming the shims you removed are on the mounting bolts that hold the caliper to the knuckle. Look at both calipers and see if you have the shims in the correct order.

As far as I know, you don't have to unbolt the calipers to swap pads on 4 piston wilwoods. The wilwood calipers I've seen have a cotter key inserted above the pads you remove, then pull the pads out from the top. You can push the pistons back using the old pads turned sideways as a lever.

 

Well crap. That makes sense, I've driven more since then, and it has straightened out quite a bit, but I still get a tiny brake squeal at 1-4mph without my foot on the brake.

 

Sorry man, I should have read better. Being that you didn't open the hydraulics, and had no previous issues, air is very likely NOT your problem.

 

 

You didn't leave any greasy fingerprints on the right rotor did you? Oils and grease have been known to contaminate the pads, could cause a pull and some noise. Even so, Cobalt GT-sports will have more noise than the OEM pads.

"If your brakes don't sqeak you have girly-man brakes"

 

Thanks for the help everyone. Does it make sense that the car would straighten itself out after awhile of driving, cause it sure feels that way. Would the pads eventually rub down to where they are equal??