[DML] Re: Exceptional steering rack rebuild???

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Runnout can be lateral or vertical as you point out. If it is the
wheel (rim) there is little that can be done. If it is not too bad a
wheel shop can sometimes bend or machine it out. If it is the tire
sometimes remounting it can help. I do not like "shaving" to correct
it. If the tire was properly made (and shaved) at the factory it
should never be necessary in the "field". I also do not like or
recomend dynamic balancing "On The Car". If you should ever have to
take the wheel off you will lose the balance unless you index it back
on in the exact same position. Tires can be balanced very accuratly
with a dynamic balancer off the car. If you have a problem with the
rotating assembly of the car (the rotor or hub) it should be corrected
not "balanced out". BTW to balance ON CAR assumes that the bearings
are perfect and are not causing runnout. That is not a good way to do
it because every bearing will have some runnout and play. Bottom line
is to have all 4 wheels dynamicaly balanced off-car. If it takes too
much weight to balance or they are wobbling in and out or up and down
on the machine find out what is wrong. Do not try to "shave" tires or
balance a bent rim or a defective tire. Shaving tires is best done on
heavy trucks with recaps, not cars. I jack the tire up off the ground
and put a small piece of 2X4 next to the tire but not touching. Now
spin the tire by hand and watch if the gap between the wood and the
tire changes. It should not change more than 1/16 of an inch. Same for
up and down. If it does move a lot check the rim. If the rim is bent
the tire will not run true. If the rim is NOT bent the tire is
defective. Another point to make. All new tires come with a mark to
indicate where to put the valve stem in relation to mounting the tire
onto the rim. If the shop does not follow that mark it can take an
excessive amount of weight to balance the tire.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Bruce Benson" <delornut@xxxx> wrote:
> One thing that I've gone through more than once is tire run out. If
you jack
> the car up just enough to get the tire tread an inch or so off the
ground
> and then spin the tire you can see if the tire is round or if the tread
> appears to move up and down a bit. Many times it's the way the tire was
>






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