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Need help - low speed squeaking brakes

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TrailblazingScot, Feb 1, 2011.

  1. TrailblazingScot

    TrailblazingScot New Member

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    Quite a saga.

    Bought my Prius about 14 months second hand from cargiant in London. Despite their 112 checks or whatever, within a few months the brakes were grinding. I took it to a local garage and they said the pads were worn to near nothing and replaced them all. They said I had scoring on the rear brake discs, so I replaced them too. Had Toyota dealership not quoted me stupid on the job (all lumped in with service and MOT I'd have had it done there).

    I got really back noise with the front brakes every time I used them after a few weeks. Took it back. Was told that the front discs needed replaced (and off course the front pads again). Pfft. It was soon back to noisy and they replaced the front pads for nothing. The problem went away for a few days, then returned, but only a very low speed braking (or when putting the final squeeze.)

    That garage tried a few things, then said it was my heaving braking glazing the pads, so they roughed them up. Problem hadn't gone.

    Add to this that the non-moving parts are really rusty looking, it looks naff.

    Well, I took it to Kwik Fit having had some time to save some money for a proper fix. They would be happy to replace all discs and pads, but it'd cost abit. Called Toyota, they cost about the same.

    I left my car with Toyota yesterday pointing out the problem and a few other things I wanted fixing. I made it clear I felt the brake discs and pads were 'crap' and not Toyota and wanted them replaced. They said they'd inspect and do what was necessary.

    Well, I've new windscreen wipers, they sorted out a separate problem and cleaned out the front brakes. According to Toyota there is nothing to stop those parts of the brake disc that aren't moving from rusting. They also said the discs and front pads were fine.

    Well, that squeaky noise is still there.

    Why, after practically begging, did they not just replace everything? Is there any other possible explanation for the low braking speed squeak? Why don't brake discs not come with those parts not in contact with the brake pads painted so they won't rust?

    I'm annoyed - it is really spoiling my enjoyment of this car. My little astra never gave me any such hassle.
     
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Odometer reading?

    1. The brake discs can reach very high operating temperatures so they are not painted. I suggest that you do not need to worry about rust on disc surfaces that are not contacted by the brake pads.

    2. Actually, it sounds like your Toyota dealer tried to do you a favor by not replacing brake parts deemed to be in good condition.

    3. It sounds like your squeak problem results from very light brake usage and the discs rusting.

    4. I suggest two things that you might do to deal with the problem:

    - Remove disc corrosion on the surfaces contacted by the pads, by finding a road without traffic behind you, getting up to 50 mph or so, then shifting into N and moderately braking to a stop. Repeat several times. By shifting into N, all of your braking is friction, which will scrub the pads.

    - If you park outside so that the brake parts get wet overnight, or if you wash the car and get the brake parts wet, then the next time you drive the car clean off the discs using the procedure above. Good luck.
     
  3. TrailblazingScot

    TrailblazingScot New Member

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    When the problem was particularly bad I used that approach. Possibly why the original garage told me that I'm lead footed when they roughened by glazed pads.

    Would so love to be in California where there appears to be quite a fraternity of knowledgable Prius owners. Plus, it probably isn't so wet :)
     
  4. TrailblazingScot

    TrailblazingScot New Member

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    Oh yes, we've about 79,000 miles on the odometer.
     
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Glazed pads are not good. I'm suggesting that you employ moderate braking, not a panic stop.

    Many other UK owners have complained of brake rust. I would guess this is due to the wet weather there and the fact that European Prius have larger brakes than US and JDM Prius. Hence your brakes stay cooler and are more susceptible to rust.
     
  6. TrailblazingScot

    TrailblazingScot New Member

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    I had a Ford Focus ST and a little Astra. Behind those alloys you'd see the brake discs. The non-moving parts were never rusty.

    We have had a pretty tough winter by UK standards, but these brakes were pants during the summer. The brakes do their primary job well - stopping me. It is just the noise and appearance that really piss me off. My last two cars had awesome alloyed wheels and no rust to spoil the appearance. My Canadian fiance needed an automatic, so the Prius seemed a good option and in every other respect it is wonderful, but lets face it, the Prius alloyed wheels are so ugly they have to have covers over them.

    Hmm, abit off topic.
     
  7. TrailblazingScot

    TrailblazingScot New Member

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    Well, the advise to put the car into neutral, which I foolishly tried again is pants and made the problem worse.

    These brake discs are going to be history.
     
  8. richard schumacher

    richard schumacher shortbus driver

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    Take pity on an ignorant Yank: what does "is pants" mean?
     
  9. seilerts

    seilerts Battery Curmudgeon

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    Perhaps the naff'd components need to be replaced: caliper assembly, antisqueal shims. Maybe put on new ceramic pads and turn the rotors again.