Stock suspension grinding/whine/squeal

[kenichicuadrado]

Hello, I'm writing this to see if someone can help me. Basically what I'm having is a very loud grinding and screeching noise just like when brake pads are in the verge of dying. It does it very very loud whenever I am parking in reverse. It's so loud that even with the windows up and stereo at a high volume you can even hear it. Also when braking in a straight line it does that too sometimes but not so much as when going into reverse with the steering wheel completely to the right or left. I replaced the left steering knuckle days ago because it broke after someone crashed near my wheel. The impact was mostly in the left front fender and the front bumper.

I am thinking it might be a bent disc or a semi stuck caliper or brake or some belt.

Has anyone had this problem before or knows what can be done to fix it? Any work around or fix?

I am thinking on taking it to the dealer where I bought it and request a warranty repair but I believe it might not be covered as it was a car crash.

 

[mykflo]

I thought there was a thread recently regarding warped rotors? Or brakes or something.. keep browsing through here I will too

 

[kenichicuadrado]

I thought there was a thread recently regarding warped rotors? Or brakes or something.. keep browsing through here I will too

I think this is what you're looking for http://www.mazdas247.com/forum/showthread.php?123813013-Front-Rotors-Warped

But in my case it's not a warped rotor because it doesn't vibrate when braking. It's just a sound like this one but way louder when you're steering to any side and going on reverse whether it be on Neutral or reverse gear (Manual Transmission)

http://youtu.be/O83KpuLPCF8

Exactly that same noise but louder. I don't think it's something stuck into the brake system because the car was parked for two months without any kind of movement until it got repaired.

 

[EF9]

You mentioned a car crash so I would start from there and look at what was affected/damaged and the areas surrounding that.

 

[flatlander937]

To me sounds like something damaged in the rear drum, I've seen similar stuff before if the friction material separates from the backing plate, it will stay somewhat where it's supposed to going forward, and in reverse the friction material will go for a ride partway around the drum creating a grinding noise.



First off figure out if it's coming from the front or rear... you didn't say. The best way I've found to isolate a noise to front or rear is to turn your head sideways and duplicate the noise with all the windows down, stick your head partway out of the window if possible(works best if it happens to be on the driver side of course). Turning your head sideways makes you use only one ear for the sound, so it should be very obvious as you'll only hear it from one side or the other.

 

[jasyatz]

It might be as simple as the front brake disc steel backing plate is distorted and hitting the edge of the brake rotor as the wheel turns. There's alot of torque on the knuckle especially in reverse.. Take the wheel off, and put the car in neutral.. put the lug nuts back on the rotor, and turn the rotor by hand...I'll bet you'll find your noise. If its not on the crashed front wheel side where you replaced the knuckle, do the same procedure on the remaining front wheel , if it's not up front, do the same to the rear( parking brake off and lug nuts back on). You have to put the lugs back on or the rotor and/or drum won't seat all the way back on the hub.. Just remember work safe and make sure you use jack stands and wheel chocks to keep the car from rolling.

 

[kenichicuadrado]

It sounds from the drivers front side. The car that crashed against me broke a little part of my wheel so I am going to do what you said jasyyatz. The impact started from wheel to front bumper when I was making a u turn and the driver on my back decided to speed out and go into his opposite lane when I was doing the u turn. Here is a picture of the damage where you can see that the wheel impact was mostly on the tire, not the wheels

The car did start but would not move. It never made that sound when I moved the steering wheel. Is there any chance that the knuckle needs some grease somewhere and the guy who repaired it didn't use it?

 

[flatlander937]

Look at your brake caliper and bracket bolts. I've seen a truck come in before missing(!) a caliper bracket bolt. It would rotate down and stay out of the way n drive, in reverse it would tilt outwards and grind against the inside barrel of the wheel.

Again, without you taking a wheel off and checking these are all just blind guesses.


Is the noise consistent with wheel speed or with turning the steering wheel? Nothing should need greased, everything is sealed from the factory AFAIK.

 

[kenichicuadrado]

Look at your brake caliper and bracket bolts. I've seen a truck come in before missing(!) a caliper bracket bolt. It would rotate down and stay out of the way n drive, in reverse it would tilt outwards and grind against the inside barrel of the wheel.

Again, without you taking a wheel off and checking these are all just blind guesses.


Is the noise consistent with wheel speed or with turning the steering wheel? Nothing should need greased, everything is sealed from the factory AFAIK.

The noise is just when you have the steering wheel completely to the right or left and going in reverse. If you just steer a little it doesn't happen. I'm waiting at a repair shop to see what they tell me. Will update soon to see what's happening.

 

[kenichicuadrado]

Update: Just like jasyyatz said. It was the #14 backing plate thing in the picture that was bent a little and made contact with the brake disc. As the car was in complete standstill for 2 months and a half, the disc cristalized and they moved the brakes to the other part of the disc after saying it was dangerous to drive like that. Don't know how will that end up but I don't like the looks of it, it looks like the car doesn't have any brake pads on the front now. I got the option to replace the discs or do some repairing thing that I don't know how it's said in English, I think it's called turned (I talk Spanish as native language). I'll do it later when the budget is ready. Thanks for the help guys

 

[jasyatz]

Glad to hear it was simple. Does the steering wheel vibrate when you brake lightly from 60mph? if not, no need to resurface. If it does vibrate, you can pay to have someone resurface (or turn) them, or just get some tools and swap them out for yourself. It's not that hard, and woud be a good intro into basic vehicle maintenance for you. and save you a couple bucks (dollars) in the process.

 

[kenichicuadrado]

Glad to hear it was simple. Does the steering wheel vibrate when you brake lightly from 60mph? if not, no need to resurface. If it does vibrate, you can pay to have someone resurface (or turn) them, or just get some tools and swap them out for yourself. It's not that hard, and woud be a good intro into basic vehicle maintenance for you. and save you a couple bucks (dollars) in the process.

No vibrations here. Even though I might put the original steelie wheels and take it to the dealer to see if warranty covers that. I'm nearing 12K miles now so I guess I'm good.