Toyota corolla 99 - Grinding noise from right front wheel

The passenger side front wheel makes a grinding noise when ever the car
is in motion. It seems like the brake pads are touching the rotor when
the vehicle is running. I have replaced the front pads and rotors with
OEM parts. I have taken it to the mechanic several times and they open
up the brakes and say everything is fine, the car runs without noise
for a day or two and again the noise starts. Any ideas as to what is
the cause of this problem?? has the calipers gone bad and how can i
test for the calipers. Replies are appreciated.

Thanks,

Guru

"auto4toyota" <guru.sati@gmail.com> wrote in message
news:1147838522.166808.262210@i40g2000cwc.googlegroups.com...[color=blue]
> The passenger side front wheel makes a grinding noise when ever the car
> is in motion. It seems like the brake pads are touching the rotor when
> the vehicle is running. I have replaced the front pads and rotors with
> OEM parts. I have taken it to the mechanic several times and they open
> up the brakes and say everything is fine, the car runs without noise
> for a day or two and again the noise starts. Any ideas as to what is
> the cause of this problem?? has the calipers gone bad and how can i
> test for the calipers. Replies are appreciated.
>
> Thanks,
>
> Guru
>[/color]

When you replaced the pads and rotors, you did orient the wear indicators
properly, install all of the shims and springs, and lube the caliper slide
bolts with wheel bearing grease or anti-seize, right? Did the noise start
after you did the brake job or was it there before? Check to make sure the
backing plate is not touching the rotor. This is what I'd check first.

A bad caliper will either leak brake fluid, or the caliper piston will seize
in the bore. If the caliper is not leaking and you can push the piston back
into the bore, then it is OK.
--

Ray O
(correct punctuation to reply)

Check the CV joints to make sure the boots are not torn and that they are
not dry.

"auto4toyota" <guru.sati@gmail.com> wrote in message
news:1147838522.166808.262210@i40g2000cwc.googlegroups.com...[color=blue]
> The passenger side front wheel makes a grinding noise when ever the car
> is in motion. It seems like the brake pads are touching the rotor when
> the vehicle is running. I have replaced the front pads and rotors with
> OEM parts. I have taken it to the mechanic several times and they open
> up the brakes and say everything is fine, the car runs without noise
> for a day or two and again the noise starts. Any ideas as to what is
> the cause of this problem?? has the calipers gone bad and how can i
> test for the calipers. Replies are appreciated.
>
> Thanks,
>
> Guru
>[/color]

You could try putting caliper grease on the caliper sliders, that might
help. On my 99 Corolla the rubber boots seem to be glued in/ permanently
installed on the caliper so I just pulled out the slider, applied the grease
and put it back in. Doing this eliminated some vabriation I was getting
when braking downhill or on hard braking.