Re: HELP: 93 Toyota Corolla vibration problem!

"E Meyer" <epmeyer50@[EMAIL PROTECTED]
> wrote in message 
news:C4355C27.2FBCA%epmeyer50@[EMAIL PROTECTED]
>>>>>>>> Replace both front brake hoses, replace the brake fluid, and
bleed
>>>>>>>> the
>>>>>>>> brakes.
>>>>>>>
>>>>>>> Ray, I had them do this.  The problem still persists.  Could it be
a
>>>>>>> brake booster problem?
>>>>>>
>>>>>> I read through most of the posts before responding.
>>>>>>
>>>>>> It is very unlikely that a master cylinder is causing the problem, 
>>>>>> and
>>>>>> it
>>>>>> is
>>>>>> unlikely that a misadjusted push rod is causing the problem unless
>>>>>> someone
>>>>>> messed with the master cylinder or pushrod.
>>>>>>
>>>>>> It is possible, but not likely that a bad wheel bearing is causing 
>>>>>> the
>>>>>> problem.  Wheel bearings generally make a lot of noise before
getting
>>>>>> bad
>>>>>> enough to actually cause a problem.
>>>>>>
>>>>>> A wheel or tire that is out of round either laterally or radially 
>>>>>> will
>>>>>> cause
>>>>>> a vibration, but not likely that the vibration will come and go and

>>>>>> it
>>>>>> will
>>>>>> not make the wheel hot to the touch or bind the brakes so that is
not
>>>>>> high
>>>>>> on my list.
>>>>>>
>>>>>> A bad CV joint will make noise, cause pulling, or fling grease all 
>>>>>> over
>>>>>> the
>>>>>> undercarriage before it causes an intermittent vibration and will
not
>>>>>> make
>>>>>> the wheel hot to the touch or bind the brakes.
>>>>>>
>>>>>> If replacing the calipers did not change the problem, I would have
>>>>>> guessed a
>>>>>> bad brake hose.
>>>>>>
>>>>>> I read that you are replacing the front calipers, make sure that
the
>>>>>> slides
>>>>>> are free and coated with disc brake grease or anti-seize.
>>>>>>
>>>>>> Where are you located?
>>>>>
>>>>> I will add one additional possibility that I personally experienced
on
>>>>> an
>>>>> Acura TL.  A bad upper ball joint caused ALL the symptoms re****ted 
>>>>> here
>>>>> on
>>>>> that car - hot wheel, apparent warping of the rotor, chattering 
>>>>> brakes,
>>>>> all
>>>>> of it.
>>>>
>>>>
>>>> You know, IF a wheel threw a weight off it could do the same thing.
>>>>
>>>>
>>> Throwing a weight causes a constant vibration.  This was different and

>>> was
>>> confirmed to be the ball joint on the TL.
>>
>> Usually throwing a weight will cause vibration at certain speeds.
Depends 
>> on
>> the size of the wheel weight. Big ones act more harshly when missing
than
>> small ones. Remember he said the wheel DOES have a small wobble to it. 
>> Maybe
>> move a rear wheel up front. Try that for a couple days.

> I suggested rotating the wheels front to back a long time ago (and was
> apparently ignored).  I think this thread has rehashed all the 
> possibilities
> two or three times now.

    I think you are right. A couple of the "angry experts" here keep 
pounding the walls about the brake lines, missing that the guy said he
TRIED 
that. Most of the potential problems can be detected by eyeball. If he has

14" wheels on the car you can find the problem he is having as a common 
thing. Those steel wheels on the 90's model Toyotas - the 14 inchers and 
some of the 15's are notorious for going out of round. A 'slight wobble"
on 
the balance machine can translate to EXACTLY what he is experiencing with
a 
selective problem. IF he noted EXACTLY what he was doing with the car when

the problem occurs it would be easier to track down. Small things like
EXACT 
SPEED. Not a guess. Type of road and road conditions. That stuff.

    I think the wheel rotation is a easy driveway project.