Indentifying noise, possible wheel bearings...

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First off, my questions about wheel bearings in general. My mechanic thinks at least one is bad and causing the noise, but I'm not so sure it's the bearings and don't want to pay to get them done if that's not it. However, it seems there may be several noises and one could be the bearings. We're talking about the front passenger side here.

I've got an 01 Sentra SE, with 71k on it:

-how long do they usually last? If it's about time for new one's anyhow and I get them replaced and the noise isn't fixed I won't feel as bad about it.

-if only one is bad should I just do both at the same time?

-is aftermarket ok? He quoted me 67.00 bucks for the part and 125 installed, per side. I asked about the brand as normally I like to research online for price and quality. It was a 3 letter initial brand with a lifetime warranty, but I can't recal the name. Maybe it was SKF as he said they were an OEM supplier. Is OEM necessary or are there some good aftermarkets that could be recommended? It seems for that price I could get OEM, but it's the hassle factor and this guy supposedly does good work at a good price and I don't want to **** around too much with telling him to return a part and let me order, etc...

-should the hubs be done as well? Any other parts to get? I've seen reference to snap rings, dust seals and cotter pins, but would what's on there most likely still be ok?

-alignment needed afterwards?

-I'm guessing you can't tell if they are bad by looking at them?

About the noise. About a month ago I noticed my car getting louder, it was actually sudden on the highway one day. To me, it sounds like engine noise, just louder. Or a similar sound to when you have cupped tires. Like a roaring. It's really hard to figure though because it does seem tied to accelerating and when on the highway when letting of the gas as the engine winds down the noise does as well. I'd think if it was the bearings I'd still hear them roaring as my speed would still be quite high? One thing that does make me think it's the bearings is when making long, fast and somewhat sharp turns I do hear a noise...the type of turn you make when exiting the freeway. Also, the mechanic said he could feel the vibrating while he was on the passenger side during the test drive.

Thanks!

Anthony
 
Bearings can definitely go bad in 71k miles. Happens all the time.

Do them both? That's your call. Keeping the car?

Aftermarket bearings are fine, especially if the mechanic has had success with them before.

If you trust the mechanic, take his advice. You can also get a second opinion.
 
$67 for the part is quite reasonable. I'd go ahead.

You'll need an alignment if your struts have non-round mounting holes, or cammed attaching bolts. Sometimes if you already had an alignment you'll need another one, because of the tricks used to get the first one to work-- even if the FSM says camber is not adjustable.
 
I've had a lot to say about bearings that would answer most of your questions. Search "wheel bearing" and "Kestas" and you'll get what you need.

There is no need to do both at the same time.
 
Noise that is speed, not gear or RPM related.
A low whump whump noise. Maybe a low moan.

This noise may peak at 45-65 mph.
Wheel bearings can be bad and not be felt to be loose.


If these are true, you may be a redneck.

Oh, wait... that's Jeff Foxworthy's statement.
You may have a bad wheel bearing.
 
sounds like a wheel bearing to me, had the same kind thing with my cavalier. Was a humming/roaring noise that slowly got worse over time. That one was $90 to replace. The one that was on it was supposed to have been replaced 9k miles prior- it definitely wasn't. It was rusted and dirty and there is no way it had been on 1 year/9k miles. And it was bad. Also, was chinese (both fronts had been replaced around 70k miles, this one was supposed to have been changed again at 120k).
33.gif
The one I put it in from SKF was Made in USA.
 
Originally Posted By: hate2work

Bearings can definitely go bad in 71k miles. Happens all the time.

Do them both? That's your call. Keeping the car?



Yeah, I do plan on keeping the car for a long time.
 
Originally Posted By: eljefino
$67 for the part is quite reasonable. I'd go ahead.


I was seeing the SKF and OEM part online for about 28 bucks.

Originally Posted By: eljefino
You'll need an alignment if your struts have non-round mounting holes, or cammed attaching bolts. Sometimes if you already had an alignment you'll need another one, because of the tricks used to get the first one to work-- even if the FSM says camber is not adjustable.


Oh boy, that's all a bit over my head. I just had an alignment done too. Shop was pretty good, but I don't think they wanted to test to see if it needed an alignment. Would have been like 35 bucks for the estimate, but the alignment wasn't much more so I just went and got it done right off the bat. The guy I'm taking it to for this job works out of his garage. Has a lift and has been doing this a long time, but I doubt he has alignment equipment.
 
Originally Posted By: Kestas
I've had a lot to say about bearings that would answer most of your questions. Search "wheel bearing" and "Kestas" and you'll get what you need.

There is no need to do both at the same time.


Hmmm, first thing I tried when I came here to post was a search. I searched bearing under subject only and was surprised to only get 2 pages of threads, but all were from 2 threads. When I put wheel bearing, then I get too many non-related threads, even when putting it in quotes. I'll try searching your name and see if I can do better.

Speaking of using this website, is there really no multi-quote? Also, why is the text jumping up and down like crazy while trying to reply?
 
Originally Posted By: mechtech2

This noise may peak at 45-65 mph.
Wheel bearings can be bad and not be felt to be loose.



That's the speed it does peak at, actually starts to get quieter up around 70. Does that sound typical?

I definitely think I have something else going on besides the bearing, but that doesn't mean the bearing isn't bad as well.
 
Originally Posted By: Nick R
sounds like a wheel bearing to me, had the same kind thing with my cavalier. Was a humming/roaring noise that slowly got worse over time. That one was $90 to replace. The one that was on it was supposed to have been replaced 9k miles prior- it definitely wasn't. It was rusted and dirty and there is no way it had been on 1 year/9k miles. And it was bad. Also, was chinese (both fronts had been replaced around 70k miles, this one was supposed to have been changed again at 120k).
33.gif
The one I put it in from SKF was Made in USA.


Your saying you ended up happy with the SKF?
 
Originally Posted By: aman74
Originally Posted By: mechtech2

This noise may peak at 45-65 mph.
Wheel bearings can be bad and not be felt to be loose.



That's the speed it does peak at, actually starts to get quieter up around 70. Does that sound typical?

I definitely think I have something else going on besides the bearing, but that doesn't mean the bearing isn't bad as well.


Nope, that's right. My cavalier was loudest at about 40-45mph and faster than that would be progressively quieter.
 
Originally Posted By: aman74
Originally Posted By: Nick R
sounds like a wheel bearing to me, had the same kind thing with my cavalier. Was a humming/roaring noise that slowly got worse over time. That one was $90 to replace. The one that was on it was supposed to have been replaced 9k miles prior- it definitely wasn't. It was rusted and dirty and there is no way it had been on 1 year/9k miles. And it was bad. Also, was chinese (both fronts had been replaced around 70k miles, this one was supposed to have been changed again at 120k).
33.gif
The one I put it in from SKF was Made in USA.


Your saying you ended up happy with the SKF?



Worked fine for the 10k miles I had the car after I put it on.
 
Do I need or should I replace the hub too?


Thanks for all the help guys, sorry I couldn't seem to figure out how to multi-quote or you just can't here.
 
I'm not too familiar with the Sentra. My cavalier had a hub unit bearing, the bearing and hub were all one piece that had to be replaced. I don't know about your Sentra, sorry.

Essentially, I had to buy and replace this. The wheel studs are on the bottom side out of view

6705876_40065592082604272.jpg
 
Last edited:
Thanks Nick.

Yeah, what I'm gathering now is that the bearing can be bought seperately and pressed in, but it's more common to buy the whole unit, I guess for convenience sake and less labor. Not sure what would be cheaper labor wise.
 
I don't understand why wheel bearing replacement would need realignment of the vehicle. Wheel bearing does not control the location of the wheel on the ground. I have had to replace wheel bearings on the rear of Odyssey van, one at 70K the other at 130K and no alignment related components were touched.

- Vikas
 
Originally Posted By: mechtech2
Getting a hub and bearing is usually easiest for the home repair guy. No presses to deal with.


You're saying they would come as one unit then right? I'd be paying someone to do the work and I think he has a press. I'm more worried that if it is the bearings that they've damaged the hubs from driving on them awhile. I've heard some people just do both at the same time because just doing the bearings may not remove all the noise if there's hub damage.

I've not seen the bearing and hub sold together for my model car though.
 
Anybody?

I found these:http://www.woodys-auto-supply.com/auto-part-details.asp?prod=BCA-512303

Does that sound like it comes with 2 sets and already pressed?

My mechanic doesn't shop online so he was saying 67 a piece for just the bearings. I'm worried that I may need new hubs as well from driving on bad bearings, but he said the bearings would have to be much worse then they are now and I'd have to drive on them for quite awhile.

Thoughts?

Thanks
 
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