Brake Groan

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Old 25 Oct 2003, 09:08 pm   #1 (permalink)
Allan
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Default Brake Groan

Could someone please bring me up to date on the 99 Camry "brake groan"
problem. In the past, I've seen complaints posted to the group re a
groaning or grinding problem when applying the brakes, but happily ignored
them thinking it was something to do with the anti-lock brakes (which I
don't have) or some problem I lucked out on and didn't have.

My brakes have been and still are very smooth under light application, but
lately I have been doing more highway driving and notice applying the
brakes at highway speed, or on long steep downgrades where moderate pedal
force is required, causes a groaning noise that increases with increased
pedal force. Thinking back, this did happen a few times when the car was
almost new and I put it down to road surface noise, which I now realize it
was not.

Was any cause and solution offerred by Toyota?

Thnx for any info

Allan
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Old 25 Oct 2003, 09:44 pm   #2 (permalink)
Philip
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Default Re: Brake Groan

In news:crazy-2510031808540001@204.244.233.95,
Allan <crazy@axion.net> being of bellicose mind posted:
> Could someone please bring me up to date on the 99 Camry "brake
> groan" problem. In the past, I've seen complaints posted to the
> group re a groaning or grinding problem when applying the brakes,
> but happily ignored them thinking it was something to do with the
> anti-lock brakes (which I don't have) or some problem I lucked out
> on and didn't have.
>
> My brakes have been and still are very smooth under light
> application, but lately I have been doing more highway driving and
> notice applying the brakes at highway speed, or on long steep
> downgrades where moderate pedal force is required, causes a
> groaning noise that increases with increased pedal force. Thinking
> back, this did happen a few times when the car was almost new and
> I put it down to road surface noise, which I now realize it was
> not.
>
> Was any cause and solution offerred by Toyota?
>
> Thnx for any info
>
> Allan


I've had cars in the past do this moan/groan behavior when the brakes
got hot, especially when bringing the car to a stop a the bottom of a
long downhill, having ridden the brakes all the way down. Each time,
the rotors had become highly glazed and the pads about 60% worn.
Resurface rotors and a choice of a -lower- metallic pad took care of
it forever after.
--

~~Philip "Never let school interfere
with your education - Mark Twain"




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Old 25 Oct 2003, 11:52 pm   #3 (permalink)
Thudd
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Default Re: Brake Groan


"Allan" <crazy@axion.net> wrote in message
news:crazy-2510031808540001@204.244.233.95...
> Could someone please bring me up to date on the 99 Camry "brake groan"

On different cars I have used rough sandpaper to break the glaze on the
disks. I have even used an air tool with a sanding disk. I have seen engine
builders use the air tool on engine blocks before installing the heads. I
would not do this myself on the block, but it will not hurt the rotors if
you do it lightly.


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Old 26 Oct 2003, 08:30 am   #4 (permalink)
Wolfgang
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Default Re: Brake Groan

Some times it is as simple as accumulated brake pad dust in
the calibers. Get can of brake cleaner or high pressure
hose to wash them (do when they are cold to avoid warping
them).


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Old 02 Nov 2003, 10:28 am   #5 (permalink)
Rick Weiss
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Default Re: Brake Groan

Allan:
On my 99 Camry the brake groan was caused by the rear brake drums.
There is a Technical Service Bulletin from Toyota on this problem.
The fix is to replace the rear brake drums with a redesigned drum from
Toyota. If you had brought it to your dealer's attention when the car
was newer they would have replaced them for free. I replaced my rear
drums and shoes myself and the cost for parts was $260 from the
dealer. The noise has been gone for 15 thousand miles now.

Hope this helps.

Rick

On Sat, 25 Oct 2003 18:08:54 -0800, crazy@axion.net (Allan) wrote:

>Could someone please bring me up to date on the 99 Camry "brake groan"
>problem. In the past, I've seen complaints posted to the group re a
>groaning or grinding problem when applying the brakes, but happily ignored
>them thinking it was something to do with the anti-lock brakes (which I
>don't have) or some problem I lucked out on and didn't have.
>
>My brakes have been and still are very smooth under light application, but
>lately I have been doing more highway driving and notice applying the
>brakes at highway speed, or on long steep downgrades where moderate pedal
>force is required, causes a groaning noise that increases with increased
>pedal force. Thinking back, this did happen a few times when the car was
>almost new and I put it down to road surface noise, which I now realize it
>was not.
>
>Was any cause and solution offerred by Toyota?
>
>Thnx for any info
>
>Allan


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