bwill03z

This has been going on for a good while now and I cannot figure it out. I have powerstop pads with about 70% life remaining and drilled/slotted powerstop rotors. They squeak all the time, seems like it's coming from the rear. I have taken all four rotors and pads off, cleaned, lubed and reinstalled but they still squeak. The rotors are in good shape too. Any ideas?

Bill Dearborn

Use the brakes harder. You are being too light on the pedal. You may notice the squeaking go away if you apply more brake pressure plan your stops so you stop in less distance using the higher pressure.

Bill

glfrmrk

Are they new pads on old or new rotors that were not turned. I have always turned rotors when installing new pads even if the rotors are brand new. The rotors get a glaze on them and the new pads don't bite on the glazed rotors. But that's what I do and have never had a squeaking issue.

bwill03z

When I bought the car the pads were new but I'm thinking the rotors were not. I've had some AC Delco dura stop pads laying around for awhile so I believe I will just buy 4 new rotors and have everything brand new.

Macleod52

I had this happen when the dealer replaced my rear rotors. I'm guessing either they didn't use anti squeal compound or the brakes weren't bedded in properly to the new rotors... or both.

If you do several (7-10) 65mph-10mph on an empty road while having a 30 second -1 minute cool down between each go. When done, let your brakes cool down for 15-20 minutes while NEVER comping to a complete stop. This may cure your symptoms. What you're doing is wearing off the current brake residue from the rotors and redistributing new material. The rotors will be really hot after you do this and if you come to a complete stop before they cool down enough you'll have unevenly distributed brake material where the brakes were resting.


That's my best explanation and I may be totally wrong in explaining what you're actually doing, but it should hopefully help/cure your issue. Here's Powerstop's recommended break-in procedure.

http://www.powerstop.com/brake-pad-break-in-procedure/

glfrmrk

Even when I put brand new rotors on my cars, I will turn them.You might be surprised how often a new rotor is not true. But as I said before "that's just me". Hope we have helped some. Save the wave!

UstaB-GS549

I agree. New rotors won't change anything.

You could round off or bevel the leading edges of the pads to help with squealing. A lot factory pads come this way to alleviate brake noise complaints.

British cars used to have brass shims between the pad and piston to dampen vibration.

You could find a softer less aggressive pad. High performance brake pads and noise go hand in hand.

bwill03z

Well I already have a brand new set of pads laying around so that's why I was going to get new rotors to go with them

Talbot Trammell

hey im having this exact issue with my c5 pads are decent but sounds like a dying cat! did you ever find a solution? that fully fixed it?

bwill03z

wow you revived a 4 year old thread haha. I no longer have the car but yeah I took the powerstop pads off and put on the ac delco ceramics I had laying around, added some CRC disk brake quiet to piston contact area, as well as greased all the contact points and that fixed it... never made another noise

wmupaprmkr

You have to give new users like @Talbot Trammell promos for using the search function and not starting a new post!

bwill03z

very true