94 camry brakes

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Old 26 Feb 2005, 02:03 am   #1 (permalink)
Andrew LeBreton
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Default 94 camry brakes

Hello,
My 1994 Camry (4 cylinder 220,000km) creaks under very hard braking. There
are no noises evident under gentle/medium braking. Brake performance is
good, other than for the creaking noise. Pads/discs are OK.

It sounds like a rubber/bush has gone, rather than a grinding type noise.

Any thoughts would be appreciated.

Thanks
Andrew


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Old 26 Feb 2005, 11:43 am   #2 (permalink)
Jason James
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Default Re: 94 camry brakes


"Andrew LeBreton" <owls_eyes.no.spam....@.....hotmail.com> wrote in message
news:42202d6f@dnews.tpgi.com.au...
> Hello,
> My 1994 Camry (4 cylinder 220,000km) creaks under very hard braking. There
> are no noises evident under gentle/medium braking. Brake performance is
> good, other than for the creaking noise. Pads/discs are OK.
>
> It sounds like a rubber/bush has gone, rather than a grinding type noise.
>
> Any thoughts would be appreciated.



Assuming the noise comes from the front of the vehicle:

This one may be the caliper-slide pins due loss of lubrication. The calipers
on these cars and all single piston calipers rely on the 'equal and opposite
force' law to operate ie once the piston has contacted the brake-disk/rotor,
the piston body which is actually 1/2 of the caliper, moves away from the
rotor dragging the opposite side of the caliper with the other pad against
the other side of the disk via the slide-pins.

Once the slide-pin seals fail, the lubrication is lost and they can creak
under load.

There are other culprits such as the bottom ball-joints or lower-inner
locating arm bushes (the lower arm effectively 'locates and holds' the lower
end of the Macpherson- strut as the suspension/ steering and braking
work),..these come under substantial side-load under braking. Lesser
participants include the upper Macpherson mount and the roll-bar attachment
ball and socket-joints,.....can be quite difficult finding some noises as
thrust angles change under braking.

Jason



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Old 06 Mar 2005, 06:40 am   #3 (permalink)
Andrew LeBreton
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Default Re: 94 camry brakes


"Jason James" <vellicet@bigpond.com> wrote in message
news:38bqj5F5lbn41U1@individual.net...
>
> "Andrew LeBreton" <owls_eyes.no.spam....@.....hotmail.com> wrote in

message
> news:42202d6f@dnews.tpgi.com.au...
> > Hello,
> > My 1994 Camry (4 cylinder 220,000km) creaks under very hard braking.

There
> > are no noises evident under gentle/medium braking. Brake performance is
> > good, other than for the creaking noise. Pads/discs are OK.
> >
> > It sounds like a rubber/bush has gone, rather than a grinding type

noise.
> >
> > Any thoughts would be appreciated.

>
>
> Assuming the noise comes from the front of the vehicle:
>
> This one may be the caliper-slide pins due loss of lubrication. The

calipers
> on these cars and all single piston calipers rely on the 'equal and

opposite
> force' law to operate ie once the piston has contacted the

brake-disk/rotor,
> the piston body which is actually 1/2 of the caliper, moves away from the
> rotor dragging the opposite side of the caliper with the other pad against
> the other side of the disk via the slide-pins.
>
> Once the slide-pin seals fail, the lubrication is lost and they can creak
> under load.
>
> There are other culprits such as the bottom ball-joints or lower-inner
> locating arm bushes (the lower arm effectively 'locates and holds' the

lower
> end of the Macpherson- strut as the suspension/ steering and braking
> work),..these come under substantial side-load under braking. Lesser
> participants include the upper Macpherson mount and the roll-bar

attachment
> ball and socket-joints,.....can be quite difficult finding some noises as
> thrust angles change under braking.
>
> Jason
>
>
>

Thanks for the advice. Yes, noise is definitely coming from front end. I
still have not had a chance to check lube on pins, but will let you know
tyhe outcome.
Thanks
Andrew


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