You possibly misunderstood that they need to be turned while still
mounted on the axle, I just don't see how rotors can be turned (which
requires a lathe) like that.

And rotors can not only warp from lug nuts not being tightened equally
(which is getting rare now due to heavier-duty rotors being used now on
Jeeps) but from overheating the rotors from hard braking as well. NO
automotive manufacturer will warranty the brake assembly for wear or
warped rotors beyond a "courtesy" period which is often around 12,000
miles. The reason is that brake wear and rotor warping is not generally
under control of the manufacturer since one customer might get 60,000
miles out of a set of brakes where someone else may only get 10-12,000
miles out of them.

Fred wrote:
> I had the tires rotated at 12,000 miles by the dealer, nothing else has
> been done to the vehicle. I feel that the rotors should not wear or
> warp at 18,000 miles, and is it necessary to have them turned on the
> vehicle, or are they just trying to get me to have the dealer do the job?
>
> Fred
>
>
> "Earle Horton" > wrote in message
> om...
>> I have 80,000 miles on the brakes on my 1995 Wrangler, with no work
>> performed on them except for an occasional fluid flush and inspection
>> of the
>> front pads and the rear shoes. Your theory makes some sense. In 18,231
>> miles the OP maybe had the tires rotated once, enough to get the rotors
>> warped if they used an impact wrench.
>>
>> Fred, what work have you had done on the vehicle previously?
>> Specifically,
>> have you had the wheels taken off before, and why?
>>
>> Earle
>>
>> "Mike Romain" > wrote in message
>> ...
>>> It would appear it is a really common scam the $tealerships are pulling
>>> these days.
>>>
>>> They use an impact gun to install the tires and the rotors warp. They
>>> then sucker you for a turn and use the impact gun again on the tires so
>>> the turn doesn't last at all. They are 'supposed' to finish tightening
>>> the wheels by hand with a torque wrench so the lugs push evenly on the
>>> rotors.
>>>
>>> If you go into their shop, I will bet you will see the so called 'techs'
>>> just hammering wheels on with no torque wrench to be seen.
>>>
>>> Even if they claim they use 'torque sticks' on their gun, these are not
>>> accurate enough to prevent warpage. New out of the box, those sticks
>>> are still +/- something like 15% which can make a 30 ft lb up or down
>>> difference at 100 ft lb of torque.
>>>
>>> Half the time, rather than replace, the rotors get turned under
>>> warranty, then they hammer the wheels back on and the next one is a
>>> replacement just after the warranty is up.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>>> (More Off Road album links at bottom of the view page)
>>>
>>> Fred wrote:
>>> >
>>> > I have a 2004 Jeep Liberty that I purchased brand new in November of
>> 2003.
>>> > I have 18,231 miles on it and the brake rotors are bad. The dealer
>>> > told
>> me
>>> > that they need to be turned. I was not happy with the fact that it
>>> was
>> not
>>> > covered under their 3 year or 36,000 mile warranty. I told them I
>>> > would
>>> > take it somewhere else to have the rotors turned because their
>>> price > was
>>> > ridiculous. The Service Manager told me that I should make sure that
>> the
>>> > rotors were turned on the vehicle because that is the only way they
>>> are
>>> > supposed to be done on the Jeep Liberty. Has anyone else had this
>> problem
>>> > with only 18,000 miles on their Jeep and is it true that the rotors
>>> > have
>> to
>>> > be turned on the vehicle? Thanks for any comments on this problem.
>>
>>
>

--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/