Squealling noise, please help diagnose.

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Oct 26, 2006 | 08:43 AM

litnrod

Thread Starter

Racer

Joined: Dec 2005

Posts: 295

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From: Miami FL

Squealling noise, please help diagnose.

I have a squeal, I believe coming from the back driver side wheel.

I replaced rotors and pads ~2 mths ago. Normal brake pad squeal is there.

This squeal just started a couple of days ago. It sounds like a metal/metal grinding almost like a lath on a rotor, but changes tempo with speed.

Additionally, the sound is the same with and without brake pressure.

Car is a 99 c5 w/78K.

Thanks
Rod

Oct 26, 2006 | 10:53 AM

litnrod

Thread Starter

Racer

Joined: Dec 2005

Posts: 295

Likes: 0

From: Miami FL

ttt

anyone?

Oct 26, 2006 | 01:08 PM

N0TDADYS_98

Burning Brakes

Joined: Apr 2006

Posts: 976

Likes: 1

From: Lincoln NE

wheel bearing? any vibration? been on the highway??? See if it gets worse the faster you go.... I love these test.

Oct 26, 2006 | 01:14 PM

litnrod

Thread Starter

Racer

Joined: Dec 2005

Posts: 295

Likes: 0

From: Miami FL

Quote:

Originally Posted by N0TDADYS_98

wheel bearing? any vibration? been on the highway??? See if it gets worse the faster you go.... I love these test.

that is what I am thinking...I am just trying to catch it before disaster.

No real noticeable vibration at any speed.

It is a DD and I am on the highway at 70-80 mph for at least 20 miles a day. No real differences noticed.

Anything else I can do? Maybe, I am over dramatizing it and it is just pads scraping the rotors. But I don't think so...it is definitely different. More metal on metal...and I just did a brake job.

THanks for your in put.

Oct 26, 2006 | 01:25 PM

N0TDADYS_98

Burning Brakes

Joined: Apr 2006

Posts: 976

Likes: 1

From: Lincoln NE

could just be the pads/ rotors... They do touch even while not pressed.

A bad wheel bearing will not kill ya.. your wheel is'nt gonna shoot out from under ya..

You can usually check it by jacking the car up so that wheel is suspended and wiggle it back and forth... if it wiggles bad bearing.. if not.. still could be bad but it could also be something else.

Their is a grease (silicon???) that you can spray on the brakes.. It's "designed" to reduce such noise...

Was there uneven wear on the old pads?

Oct 26, 2006 | 01:44 PM

litnrod

Thread Starter

Racer

Joined: Dec 2005

Posts: 295

Likes: 0

From: Miami FL

Quote:

Originally Posted by N0TDADYS_98

could just be the pads/ rotors... They do touch even while not pressed.

A bad wheel bearing will not kill ya.. your wheel is'nt gonna shoot out from under ya..

You can usually check it by jacking the car up so that wheel is suspended and wiggle it back and forth... if it wiggles bad bearing.. if not.. still could be bad but it could also be something else.

Their is a grease (silicon???) that you can spray on the brakes.. It's "designed" to reduce such noise...

Was there uneven wear on the old pads?

ok..good to know.

No uneven wear on pads...actually after 60K miles...I still had a lot of pad left, especially on the rear...the rotors were just warped.

Oct 26, 2006 | 01:51 PM

N0TDADYS_98

Burning Brakes

Joined: Apr 2006

Posts: 976

Likes: 1

From: Lincoln NE

give those a try and let us know.

Oct 26, 2006 | 09:53 PM

Chuckbo

3rd Gear

Joined: Oct 2006

Posts: 3

Likes: 0

Reat end noise

I'm not sure if this will help, but just this last weekend I changed the brakes on my Favorite wife's 2003 vette and had the rotors turned. After installing everything, there was a slight grinding/rubbing noise. I took the brakes completly apart, re installed them and the noise was still there. I finally jacked up the rear end and put it up on jack stands and had her turn the wheel while I listened. The problem turned out to be the top portion of the backing plate was rubbing on the rotor. I tapped it with a hammer and the noise went away.