Mike Marlow

"jtees4" <jtees4@hotmail.com> wrote in message
newsdgf93tefan5kp0rs1uk96nnq7o88mt55g@4ax.com...
> On Fri, 13 Jul 2007 12:45:24 -0400, "hyundaitech"
> <notpublic@not.public.com> wrote:
>
>>If you cannot lock the wheels, there's definitely a problem. There are
>>three main things I've seen cause this problem:
>>
>>1. Etching of rotors on vehicles that are driven infrequently.
>>2. Foreign substance on rotors (such as tire shine).
>>3. Problem with master cylinder.


> Thanks again. 1.Rotors looked fine, and the vehicle is used everyday
> for about 40 miles. 2. Never used on this vehicle (I do use it on my
> 03, which is the one I personally drive daily) 3.What I've suspected
> all along BUT suspecting and proving it are two different things.
> After i change pads tomorrow I will report back...even if I turn out
> to be wrong and it is indeed the pads. Actually I hope I'm wrong, I
> just want it working correctly. Thanks again.
> PS I am giving my son the 03 soon and buying anew car...I do not like
> the looks of the 07 Elantras at all + no more GT. I may end up with a
> Sonata. Maybe even within a few days. I won't let my experience with
> the dealer cloud my thinking...I've been very happy with both my
> Hyundais.

Master cylinders are always a consideration when a pedal is weak, but they
also generally give warning. Failures are not typically sudden. I'd never
discount a master cylinder when looking at a bad pedal, but I wouldn't put
it anywhere near the front of my list right now. BTW - that was just my
rambling - I realize you're not rushing into that one.

FWIW, I just put pads on the front of my wife's 04 Sonata. Really bad
pedal. I mean - really bad. She drives it daily and the wear was something
she had grown accustomed to until she drove my car. I drove hers and holy
cow - that pedal went lowwwww. I got pads for both the front and rear, but
only put the fronts in due to time constraints. I did not replace the
rotors, as hers were in very good condition - the best I've ever seen with
the mileage they had on them. The difference those front pads made was
remarkable. She thinks she has a brand new car now. I'm much pickier than
she is about these things, and I was impressed with the difference I saw
with just front pads. I'll get around to putting the rears in soon. Soon.
Did I say... soon?

I suspect you're going to find the quick and happy solution to your problem
this weekend.

--

-Mike-
mmarlowREMOVE@alltel.net

Deck

I took my 03 Elantra in for recall and one of the techs said i needed to
have new pads on the front because the shims were wrong. this was at about
15000 miles. can you replace the shims, I asked? no you have to do a new
pad installation. HT is that right???

hyundaitech

It's possible that the wrong shims would interfere with proper caliper
operation. I haven't checked to see whether you can get the shims
separate from the pads, but I'd think you'd just be able to remove the
shims if they were causing some sort of interference. Their purpose in
life is to reduce brake squeal, so removing them will present no safety
hazard.

By the way, I've never even heard of having the wrong shims. I'm not even
sure how this would be possible. Normally, the shim fits on top of the pad
backing plate. If the shim were wrong, I'd think it would stick out past
the sides of the pad, preventing proper installation.

jtees4

On Sat, 14 Jul 2007 12:26:06 -0400, "hyundaitech"
<notpublic@not.public.com> wrote:

>It's possible that the wrong shims would interfere with proper caliper
>operation. I haven't checked to see whether you can get the shims
>separate from the pads, but I'd think you'd just be able to remove the
>shims if they were causing some sort of interference. Their purpose in
>life is to reduce brake squeal, so removing them will present no safety
>hazard.
>
>By the way, I've never even heard of having the wrong shims. I'm not even
>sure how this would be possible. Normally, the shim fits on top of the pad
>backing plate. If the shim were wrong, I'd think it would stick out past
>the sides of the pad, preventing proper installation.

When I was doing the pads, I decided to try to put the original shims
back. I had to pry them off the original pads, but I did end up using
them. They are not stuck (glued?) on the new pads but they fit OK and
did not seem to interfere with anything so I left them on.

hyundaitech

There shouldn't be an issue of significance, then. Probably, the worst
situation that can occur is that the shim can move and contact the hub
portion of the rotor and make a squealing noise.

Deck

that is what the tech said. it was rubbing on the hub!

hyundaitech

You can either pull the shim out or just let it rub the rotor until you
replace the pads again. In the latter case, there'll be no significant
damage beyond the rotor eating up the shim.

Deck

the shim is cutting grooves in the rotor hub. only about .60, but as the
outside pad wears down, it moves more inward and cuts new grooves, now
have 2 grooves on each front hub