Rocky Mountain Club B5

Discussion Forums => Maintenance => Topic started by: kraut-sled on August 02, 2004, 10:09:07 AM

Title: Brake noise
Post by: kraut-sled on August 02, 2004, 10:09:07 AM
I have been looking for a noise that emanates from the rear of my car, and I think I have finally found it.

I have a pretty good idea that the noise is coming from my rear brakes – specifically my rear brake pads.  They seem to be loose and I can not figure out how to tighten them up.  I am not sure if the pad is too small for the seat in the caliper – if so they are too small by a ridiculously small amount – and they rattle when I hit a bump.  Or if the tension on the pads is not enough to hold them still.

Is there a way to tighten the caliper with out causing the brakes to be set too tight?  Has anyone ever had this happen to them?

I really need to figure this out before the track day or I am going to be one POed dude!

TIA
Title: Brake noise
Post by: shummer on August 02, 2004, 11:03:21 AM
Not sure how you'd tighten it. The pads just hang there. Maybe you just need more brake quiet goop. Remove pad, add brake quiet, let it set/harden a bit, and re-install pad. You'll have a rubbery padding between the pad and the caliper. It's sticky enough that the pad may even stick to the caliper. Someone correct me if I'm wrong.
Title: Brake noise
Post by: kraut-sled on August 02, 2004, 11:40:05 AM
Where do I get it?

I am willing to try anything, I can not make it louder.
Title: Brake noise
Post by: shummer on August 02, 2004, 12:01:22 PM
Any place like autozone. I've used the red-colored stuff in the plastic bottle. It's a paste/gel as opposed to the can spray.
Title: Brake noise
Post by: kraut-sled on August 02, 2004, 01:12:39 PM
I will stop in anf get some on the way home.

Thanks for the help, lets hope this is the last of the noise.
Title: Brake noise
Post by: jayryan on August 02, 2004, 01:14:43 PM
I think it's the wheels...you may have to let me use them for a while...
Title: Brake noise
Post by: kraut-sled on August 02, 2004, 02:57:23 PM
Sure hope it is the wheels, then it will become your problem.

But seriously, it is not - I have the sme problem with the OZ's.
Title: Brake noise
Post by: kraut-sled on August 09, 2004, 12:12:38 PM
UPDATE - I removed the pads and covered them in the Red Magic Goop AKA Disk Brake Quite adn it is all over.  No more noise and I am once again a happy man!

Thanks for the help gents!!!  Coors products for all!!
Title: Brake noise
Post by: jayryan on August 09, 2004, 12:16:40 PM
Quote from: "kraut-sled"
Sure hope it is the wheels, then it will become your problem.

But seriously, it is not - I have the sme problem with the OZ's.



You're so mean. No interior for you. :P
Title: Brake noise
Post by: kraut-sled on August 09, 2004, 12:18:45 PM
No Coors products for you then!
Title: Brake noise
Post by: jayryan on August 09, 2004, 12:24:46 PM
I don't like Coors anyway! HA! So there!

No seriously, I'm glad you found the source of the squeal and got it fixed
Title: Brake noise
Post by: kraut-sled on August 16, 2004, 02:31:31 PM
Alright this bull $hit is back.  I think I need to bleed my rear brakes and get the caliper to tighten up agains my pads.

Anyone willing/able to give me a had some time with this?  Hopefully this week...

Man this is getting old.
Title: Brake noise
Post by: ColoradoB5 on August 17, 2004, 07:25:56 AM
Randy something similar happened to me when I didn't put that small metal wire back on the outside of the caliper.  Do you still have that on?
Title: Brake noise
Post by: kraut-sled on August 17, 2004, 07:58:30 AM
The small wires on the back of the brake pad? or is there another wire I am missing?

I have th ewire on the back of the pads in the slot of the caliper, but it is not doing anything to stop the noise.
Title: Brake noise
Post by: ColoradoB5 on August 17, 2004, 09:08:40 AM
No it's this wire on the front of the caliper.  My brakes made a lot of noise when I left this off one time.

Here's a pic where you can see it.

(http://www.rmcb5.com/albums/album75/IMG_0669.sized.jpg)
Title: Brake noise
Post by: 03Indigo on August 17, 2004, 09:11:10 AM
dub, I think he is talkin rear brakes, not front.  Rear retaining springs are within the brake caliper...so totally different set up all together.
Title: Brake noise
Post by: JDawg on August 17, 2004, 09:13:36 AM
I currently have the same problem.  A couple thoughts, are they relitively new pads?  If so, they may not be exactly the right size.  Also, make sure the clips on the pads are staying under the caliper housing with the spring clips attached to the brake pads.
Title: Brake noise
Post by: ColoradoB5 on August 17, 2004, 09:21:05 AM
Doh!  Right you are Jon.

Randy,

For the rears, if it is not the pad making noise against the caliper it could be the rear shock bolt on the bottom.  

Do the pads squeal when you come to a stop?
Title: Brake noise
Post by: kraut-sled on August 17, 2004, 09:27:15 AM
I know it is not the shock bolts - I have checked those many times.

I know it is the pad in the caliper, becasue I can duplicate the exact noise with the car parked and the e-brake off - by tapping the pad.

I am thinking that if I can tighten the piston in the caliper enough to hold the pad still I am golden.  However I am afrade if I tighten the piston it will engage the brake all the time and then I am screwed.

Are the rear brakes "self adjusting" and I just have to live with the noise?  Or can I do something about this?

Another thought I has was to shim the pad so as to fill the space and reduce the vibration?
Title: Brake noise
Post by: 03Indigo on August 17, 2004, 09:31:31 AM
the pistons are self adjusting...the thing is, it should not be floppy...maybe your piston is stuck?  wanna swing by here and have me look at it, I have a rear brake tool and we can see if we can get it to move or if it truly is jammed?  You can come by tonight or on thursday, or we can do it at the track on Friday.  I also got the red sticky stuff.
Title: Brake noise
Post by: JDawg on August 17, 2004, 09:33:07 AM
I am fairly sure you cannot tighten the piston, or otherwise adjust the brakes except the parking brake cable tension.  The caliper is held together by a total of four bolts, two hold the top part onto the caliper, and the other two hold the caliper onto the car.  I would guess the only thing that could possibly be loose would the the bolts holding the top caliper together.
Title: Brake noise
Post by: kraut-sled on August 17, 2004, 09:37:32 AM
That is my fear.  I guess I will have to try to shim the pads...

[Homer Simpson Voice] Stupid aftermarket pads, not fitting right! [/Homer Simpson Voice]
Title: Brake noise
Post by: 03Indigo on August 17, 2004, 09:42:36 AM
Quote from: "kraut-sled"
That is my fear.  I guess I will have to try to shim the pads...

[Homer Simpson Voice] Stupid aftermarket pads, not fitting right! [/Homer Simpson Voice]


You should not have to shim your pads...if the piston is working properly, you should not have to do it, otherwise what will you do as your pad wears down, you will have the same issue again.  I bet your piston is jammed and needs to be freed.....have you worked on your brakes before?  Did you use the proper piston tool when compressing the rears?  If not, it is possible that you damaged that piston and it is not moving properly.
Title: Brake noise
Post by: JDawg on August 17, 2004, 09:46:39 AM
Jon Kessel = Resident RMCB5 brake expert
Title: Brake noise
Post by: kraut-sled on August 17, 2004, 09:50:54 AM
I have done the rear brakes twice before and I did not have the issue I have now.

I did use the brake tool to back off the piston, and I do not think the piston is dammaged, but I will double check.

I do know that when I apply the brakes, the noise is gone.  I also found that a healthy amount of disk brake quite did work for a while, but after the midnight drive the noise returned.