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Re: [Healeys] Rear End Shimmy - The Solution

To: varley@cosmos.net.au
Subject: Re: [Healeys] Rear End Shimmy - The Solution
From: "Alan Seigrist Blue 100" <healey.nut@gmail.com>
Date: Sat, 30 Jun 2007 13:33:27 +0800
Larry, et. al.,

Well kudos to Larry to be the first to suggest the tire - and thank you to
all of you who had lots of great suggestions.

I jacked up the right rear (that's where it felt like the shimmy was coming
from) and sure enough the tire was warped... I guess the belts inside had
delaminated from the tread.

I guess that's what I get for having 15 year old Riken tires on the car.

It may be interesting to note that I usually request that when people detail
my car that they don't put the oily tire shine on.  This last time I forgot,
and I found my tires bathed in this oily gooey tire shine mess.  It was only
a week after that that the tire started the wobble.  I have to wonder if the
two problems were connected, although there's no excuse for me driving on 15
year old tires.

Well, I put my spare on.  You will laugh when I tell you my spare is a brand
new 25 year old Michelin XZX 165 15 tire.  The thing has never been used and
still has the injection molding excess bits on the tread.  Oh well, at least
the car is driveable until I can get 4 new 185 70 R 15 tires here in HK.
Those are "special order".  Have to wonder how long it will take to get!

Cheers,

Alan


'52 A90
'53 BN1
'64 BJ8

On 6/25/07, Larry Varley <varley@cosmos.net.au> wrote:
>
> Alan
> I have had this happen, and it turned out to be a tire that was coming
> apart internally. The tyre looked ok, but when I spun the wheel there
> was a lump in it
> Cheers
> Larry
>
> Alan Seigrist Blue 100 wrote:
> > No, I'm not talking about Christina Aguilera!
> >
> >
> > I have a very mysterious rear end shimmy at all speeds, whether in gear
> or
> > out of gear.
> >
> > When going slow it feels like one of my rear wheels is out of round.  It
> is
> > somewhat severe and getting worse... to the point the car shakes quite a
> bit
> > at speeds over 40mph.  I can feel the shimmy in the seat of the car even
> > doing 10-15 mph.
> >
> > I have checked for oil leaks around the rear hubs (there are none) but I
> > don't expect any because I had just tightened the spline lugs on both
> sides
> > just about a month ago.  No oil is leaking, so I know the lugs are
> tight.
> >
> > I have a BJ8 with Cape's rear disc brake conversion kit, so it can't be
> > drums out of round.  I've looked at the discs closely and they don't
> seems
> > to have any scoring so it doesn't appear that the hub is loose, but It
> is
> > hard for me to confirm.
> >
> > There is no noise or whining of any sort, so I don't think the rear hub
> > bearing is bad.
> >
> > The only thing that I can think of is the hub's octagon fixing-nut has
> come
> > loose somehow and the rear hub bearing is now sitting in a slightly
> offset
> > position.
> >
> > Any other thoughts before I start ripping the rear end all apart?
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