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Old 12-11-2008, 09:43 AM   #1
mxpunk
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Default unbalanced wheels or bad wheel bearings

on my 02 wrx w/ sti bbs rims i notice there is a loud humming noise when driving @ 40-60 mph, its even pretty noticeable when rolling to a stop @ lower speeds.

i havent had them balanced yet and im not sure if the previous owner did, however my old 96 obs impreza wagon used to do the same thing and the wheels were balanced..

is it possible the rear wheel bearings are bad? the car has 110K on it
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Old 12-11-2008, 10:20 AM   #2
En Sabah Nur
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How can you tell if your bearings are bad, what noises would be heard?
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Old 12-11-2008, 10:25 AM   #3
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did you try to rebalance them?
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Old 12-11-2008, 01:10 PM   #4
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Quote:
Originally Posted by En Sabah Nur View Post
How can you tell if your bearings are bad, what noises would be heard?
i dont know, thats why i posted here..

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Originally Posted by 1stockwrx View Post
did you try to rebalance them?
not yet, i think im going to get them powder coated and when i put the tires back on ill have them rebalanced
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Old 12-11-2008, 01:46 PM   #5
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wheel bearing noise will be speed dependent. But it also should be at occurring at most speeds.

Are you sure its not just the tires hitting some body harmonic or possibly just tire noise (especially if your car may be out of alignment.)

Wheel imbalance will be felt before its heard.
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Old 12-11-2008, 02:13 PM   #6
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It could be your wheel berings, but does the sound go away when you turn right or left? or get more intense when you turn one direction?
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Old 12-11-2008, 03:29 PM   #7
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Quote:
Originally Posted by DiscoGsus View Post
wheel bearing noise will be speed dependent. But it also should be at occurring at most speeds.

Are you sure its not just the tires hitting some body harmonic or possibly just tire noise (especially if your car may be out of alignment.)

Wheel imbalance will be felt before its heard.
body harmonic..as in rubbing? i dont think they rub, they are BBS STi rims off an 04 sti. it has cooper zeon? tires i think..are they known to be noisey?

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It could be your wheel berings, but does the sound go away when you turn right or left? or get more intense when you turn one direction?
naa, i just mostly notice it while on the highway crusing, it sounds like its coming from the rear.
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Old 12-11-2008, 03:41 PM   #8
EdHilario
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I would say check the balance on the rear tires first.
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Old 12-11-2008, 07:40 PM   #9
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Is the noise coming from a specific corner or side of the car? You could try and rotate the tires and see if the noise follows the tires. Otherwise could be the bearing.
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Old 12-11-2008, 11:36 PM   #10
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Whats your tire tread like? I've mistaken wheel bearings for worn tread before.

In my experience, wheel bearing noise will slightly go away when taking a curvy exit ramp from the freeway. Either loading or unloading that bearing lessens the howl.
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Old 12-11-2008, 11:50 PM   #11
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Quote:
Originally Posted by ritky View Post
Is the noise coming from a specific corner or side of the car? You could try and rotate the tires and see if the noise follows the tires. Otherwise could be the bearing.
the back side of the car........


the tread is in good condition, not too worn..
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Old 12-12-2008, 12:01 PM   #12
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the back side of the car........


the tread is in good condition, not too worn..
Rotate them to the front and see if the noise follows.
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Old 12-12-2008, 05:08 PM   #13
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With the car unloaded in the air on jack stands, try rocking the wheel from the 12 and 6 o'clock position. If you notice play at the wheel bearing point, I'd start looking for a replacement.
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Old 12-12-2008, 09:46 PM   #14
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Unbalanced tires usually dont make noise. If they do they will shake you out of the car. Cooper zeons are a lil noisey because of the tread design. Sounds like a wheel bearing or possible uneven tread wear. try running you hand along the tread and feel for and high and low spots or waves. This is called cupping or feathering.

This is what cupping can look like.

http://images.google.com/imgres?imgu...3Doff%26sa%3DG
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Old 12-16-2008, 01:10 PM   #15
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Quote:
Originally Posted by HALFSTI View Post
Unbalanced tires usually dont make noise. If they do they will shake you out of the car. Cooper zeons are a lil noisey because of the tread design. Sounds like a wheel bearing or possible uneven tread wear. try running you hand along the tread and feel for and high and low spots or waves. This is called cupping or feathering.

This is what cupping can look like.

http://images.google.com/imgres?imgu...3Doff%26sa%3DG
thx ill give it a look for sure
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Old 12-16-2008, 02:36 PM   #16
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body harmonic like the vibration/noise from the tires is causing some part of the car to vibrate at the same frequency (or one of its harmonics.)

I would guess too much Toe in or out on the back wheels. It will make sort-of noisy tires.... REALLY noisy.
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Old 12-16-2008, 03:04 PM   #17
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probably the tires itself. as tires wear they get real noisy.
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