tire wear, wheel bearings

[Matt McCrary]

Bad wheel bearings will sometimes pass the "vertical axis" test, at  
least the completely shot rear wheel bearings on my B13 did.

_________
matt mccrary

On Nov 20, 2010, at 8:14 PM, David Pertuz <davidpertuz at mindspring.com>  
wrote:

> No, there's no play in anything. It sounds quite bad, and if a wheel  
> bearing is so bad that it sounds like it does (I mean, it's not  
> roaring like a lion but it's not hard to miss, either) I'd think it  
> would have play, too - but no. That's part of the reason for my  
> doubt about a diagnosis. There is also a bit of a vibration from the  
> front end (apparent front right), and I can feel it in the form of a  
> 'bump' at very low speeds, too. Like 2Hz @10mph or so. I've no other  
> reason to think my wheel(s) are out of balance, and besides I just  
> rotated them and took the car out for a drive and no change, really.  
> So I am still not left with anything better than a wheel bearing.
>
> Also, when I rotated the tires I could see that the rear tires also  
> have a similar wear pattern - a bit extra on the inside 1.5cm or so,  
> slight feathering. So I don't think any wear pattern on the RF is  
> related to the front end issue.
>
> David
>
> -----Original Message-----
> From: Tim Rogers
> Sent: Nov 20, 2010 7:32 PM
> To:
> Cc: se-r list
> Subject: Re: tire wear, wheel bearings
>
> The "wub-wub-wub" makes it "sound" like wheel bearings.
> If you jack up the front and try to rock the front wheels along the  
> vertical axis, do you get any play?
>
> Tim Rogers
>
> On Sat, Nov 20, 2010 at 1:11 PM, David Pertuz <davidpertuz at mindspring.com 
> > wrote:
> Hi y'all,
>
> My tire-wear-reading kung-fu is pretty rusty, as pretty well-sorted  
> cars
> mean I've not had to do any in years.
>
> On my G20, RF tire has noticeable additional wear on the inside  
> 1.5cm or
> so of tread - not really severe, but enough to notice. An additional
> bevel, with slight concavity. LF tire has normal wear but very slight
> additional wear and very slight cupping on the inside inch - this is
> consistent with the strong left pull that I've had for a while.
>
> LF tire is not a mystery - it's the RF I'm not sure about. The car  
> seems
> to have an obviously bad RF (or RR?) wheel bearing - by sound, anyway.
> There is the hum-roar under load, some wub-wub-wub. I need to take  
> care
> of this ASAP (I wish I could do this without an arbor press, but of
> course I don't have one, so I need to find a place to take it to) but
> I'm  abit unsure of the diagnosis since the apparent source of sounds
> can be tricky and nothing is bad enough that it is mechanically loose
> when you tug on the wheel.
>
> Tie rod ends are probably OK but I think I'll replace them soon  
> anyway.
> Front end feels fine in terms of tightness but it's got 165k so it  
> won't
> hurt. Tie rod ends car cause toe issues and related wear, but the wear
> on the RF tire does not suggest toe to me due to the pull to the other
> side.
>
> Thoughts?
>
> David
> Chicago
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