The front disks and pads (mintex) were changed on the car and straight
after the steering wheel started to shake after I got to speeds 50 mph
and more



I took the car to the garage to get two new tyres on the front but the
car still shook after they were fitted. I took the car back to the
garage and they checked the balance of the wheels and said they were ok



I now have got a rubbing kinda sound (almost like the sound when you
partially leave a back window open in car at high speed) coming from
the front wheels, its sound like more from the passenger side but I
could be wrong (I've swapped the front and rear wheels around but
there is little difference)



Please please tell me what wrong



Many thanks

sorry its a sabb 93 yr 2000 2lt turbo 185bph

On 7 Aug 2006 05:44:26 -0700, jgbeaker (AT) hotmail (DOT) com wrote:

At a guess, I'd say the disks have been very badly fitted. There's
probably something stuck between a disk and the hub, preventing it
from sitting flat. It should be easy to spot because you'll have
monster runout on that disk. Take it back to whoever did the disks and
get them to re-check the runout. If it turns out to be bad, ask them
why they didn't spot it in the first place...

Cheers,

Colin.

thanks colin, I'll check it out
top man

The sandpaper sound, does it happen more at about 2000 RPM and under
acceleration? If so, it is likely a wheel bearing going, my 9-5 started
this, did it for about a year and a half before it got worse and started
makign the tell-tale noise of a bad bearing.

As for the brakes, if the wobble is in the steering wheel it'll be the
front, if it's in the butt of your seat it's the back. Did you have the
back checked?





On 8/7/06 8:44 AM, in article
1154954666.867355.205440 (AT) b28g20...oglegroups.com,
"jgbeaker (AT) hotmail (DOT) com" <jgbeaker (AT) hotmail (DOT) com> wrote:

You have a sticking caliper. The mechanic who changed your brakes
needs to free it up.
He did a poor job. Try spraying the caliper with WD40. It might clear
up the problem.

On 10 Aug 2006 07:04:03 -0700, darthpup <amchitka (AT) mailexcite (DOT) com> wrote:
NEVER put WD-40 near any mechanism you feel is important. It's a water
displacer and leaves a film of grit-attracting wax when the carrier
evaporates. It's exactly what you don't want to use, pretty much
anywhere.

That said, I'm not sure how even a penetrating oil is going to have a
lasting effect on a sticking caliper, and I'm not sure I understand how
a sticking caliper (a static force in one direction) could cause a
wobble (an oscillating force in two directions). Sounds more like a
warped disk to me.

New discs are not warped Dave. I use WD40 all time with good results.
Try it you might learn something.

darthpup wrote:
Why could "new disks" not be warped? In fact, if the OP did not have
any symptoms before replacing the disks, but now after doing so suddenly
feels brakes wobbling I would say it is *very* likely that the rotors
are the culprit.

And no, one should never spray WD40 on brake calipers. Really bad idea.

--
-Fred W

On 11 Aug 2006 11:05:32 -0700, darthpup <amchitka (AT) mailexcite (DOT) com> wrote:
Which point about WD-40 that I specified do you disagree with? That
it's a Water Displacer (notice the letters), or that it leaves a sticky
residue? It's not a penetrant. It's a lousy lubricant. The only thing
_I_ use it for, is as a cutting fluid when turning aluminum on the
lathe, for that it's fine. As far as any sort of putting it on brakes,
though, it's entirely the wrong substance.

Further, how do you reason that pulsating source (bidrectional) is
caused by a stuck caliper (a static, one directional force)? What
possible circumstances could make that be true? I'm trying to picture a
stuck caliper causing a pulsation, and the geometry just isn't there. A
drag, sure, but that'd be consistant unless the _rotor wasn't planar_.

So, other than suggesting the wrong chemical to fix the wrong problem which
doesn't match the symptoms described, your advice is right on. If you
do have some actual logic or reasoning behind your, um, theory, I'd be
delighted to read it.