Brake problem on corolla

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Old 02 Aug 2003, 05:13 pm   #1 (permalink)
Renping Yin
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Default Brake problem on corolla

Hi All,

Please forgive me if I am on wrong group. But I can't find group for
corolla.

Recently I changed the rotor, pads and shoes for front and rear brake
because I found I have to press brake really hard to stop the car when
the car is running around 65/hour.

After I changed everything(rotor, pads and shoes), also bleed the
brake oil in the system, but I didn't see any improvment on the brake.
I still press really hard in order to stop the car.

Please help and tell me what I should do next.

Thanks in advance

Allan



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Old 02 Aug 2003, 05:35 pm   #2 (permalink)
Philip®
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Default Re: Brake problem on corolla

In news:sIWWa.56799$wk4.47560@twister.nyroc.rr.com,
Renping Yin <ryin@nycap.rr.com> jubilantly posted:
> Hi All,
>
> Please forgive me if I am on wrong group. But I can't find group
> for corolla.
>
> Recently I changed the rotor, pads and shoes for front and rear
> brake because I found I have to press brake really hard to stop
> the car when the car is running around 65/hour.
>
> After I changed everything(rotor, pads and shoes), also bleed the
> brake oil in the system, but I didn't see any improvment on the
> brake. I still press really hard in order to stop the car.
>
> Please help and tell me what I should do next.
>
> Thanks in advance
>
> Allan


Are the calipers able to move back an forth on their pins? Is there
grease on the rotor surfaces or brake fluid on the drums? You used the
term "rotor" ... as in ONE rotor. Did you replace both on the front axle
or did you make a typo? ;^)
--

~~Philip

cantankerous | kan-TANG-kruss | adjective: difficult or irritating to
deal with.

Example: Philip was always cantankerous in the morning, given to snapping
and snarling until he'd had his first cup of coffee and a soothing hot
shower.


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Old 04 Aug 2003, 03:51 pm   #3 (permalink)
Jason James
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Default Re: Brake problem on corolla


"Daniel M. Dreifus" <nospampls2002@yahoo.com> wrote in message
news:c5ef7dc0.0308040620.5313230c@posting.google.c om...
> "Renping Yin" <ryin@nycap.rr.com> wrote in message

news:<sIWWa.56799$wk4.47560@twister.nyroc.rr.com>. ..
>
> > I still press really hard in order to stop the car.
> >
> > Please help and tell me what I should do next.
> >

> Check the vacuum brake booster.
> Sounds like you are not getting the vacuum assist.
> Not really sure just how to diagnose, haven't seen these go bad.


The rough and ready method described in manuals sometimes and used by
mechanics is to apply pressure to your brake pedal, then start the car (pump
the pedal before starting car to use all avail vac). The booster will pull
the pedal down slightly (varies, but at least 1/4 in). The in-linevlave can
fail and allow stored vacuum (for idle periods) to dissapate into the intake
manifold.

The compensating air-filter can clog restricting diaphragm movement or the
diaphragm can rupture (in which case it will fail the firt test and the test
you have mentioned plus the engine may develop a miss on the cylinder/s
closest the vac-port)

Jason


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