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Thread: "tuk" sound if brakes are engaged on downhill

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    Default "tuk" sound if brakes are engaged on downhill

    Why does this happen? I don't think it is normal. The car in question is a 2009 Corolla. 77k on the odo. There is no sound when the car is going straight or even when taking a turn. But whenever I press the brakes on a downhill stretch (e.g. going into the basement parking of my office) there is single noticeable TUK sound (I usually notice it as soon as I turn the steering wheel .. the driveway curves going downhill) that seems to emanate from the front right hand side of the car. That's it. Just one single TUK and then everything behaves as normal. Any insights?

    Don't think its CV joints as boots seem perfectly intact from visual inspection. What else could it be? Brake shims? chimta/lower arm?

    Click here for SOLUTION

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    Same problem with my car. But its solved now.
    Culprit was brake caliper pins.
    First i replaced the pins with used one.because i couldnt find the brand new pins at any toyota dealership. few weeks passed and sound came back.
    Went to toyota dealership and they repaired the pins. Till now brakes are fine. No more "tuk" sound
    The best car safety device is a rear-view mirror with a cop in it.

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    Thanks. I'll try that then.

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    &quottuk" sound if brakes are engaged on downhill -1460670
    These pins came out of my corolla. You can see first pin has more wear tear sign+ bent while last one is badly bent. Middle ones are just fine.
    I took it to Toyota dealership because i believe roadside mechanics are just crap.
    Bought used pins for 1200.
    Greasing+repairing pins=800
    Labour Cost=500
    The best car safety device is a rear-view mirror with a cop in it.

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    Very useful, thanks for sharing. Am taking the car to Toyota tomorrow morning to have the problem resolved. Hoping they have the part in stock.

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    Toyota checked out the car today but they are of the opinion that the brake caliper pins are just fine. They suggested I replace the front brake pads and additionally the discs can be smoothed by the laith machine and the problem of "tuk" sound should disappear. Total cost Rs. 14500!

    Does this make any sense? Can it really just be the brake pads? And is the cost of genuine Toyota brake pads really Rs. 9700 as they claim?

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    @oahmed - jack up right front of the car rotate the wheel & check any play in spring loaded shock absorber, hold wheel with both hands try to feel any play in the suspension, one slight TUK down hill or while braking in reverse is most likely upper insulator as in picture has developed fracture

    &quottuk" sound if brakes are engaged on downhill -1463647
    - www.crackwheels.com - A skilled Dictator is much more beneficial to Country......than a Democracy of Ignorant people

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    Quote Originally Posted by capsat View Post
    @oahmed - jack up right front of the car rotate the wheel & check any play in spring loaded shock absorber, hold wheel with both hands try to feel any play in the suspension, one slight TUK down hill or while braking in reverse is most likely upper insulator as in picture has developed fracture

    &quottuk" sound if brakes are engaged on downhill -1463647
    Hmm interesting .. will follow your instructions and try to determine if there is any play in the shock/suspension. Upper insulators are same as upper shock mounts that can be viewed under the hood?

    Waisay I did ask Toyota to check the suspension along with the brakes when I handed the car over to them yesterday to diagnose the TUK sound and they came back and said there was nothing wrong with the suspension. Having said that, they only did a visual inspection as per their own service advisor and from previous experience I don't trust Toyota at all in diagnosing problems. They may be great for replacing parts and more routine tasks but they are never able to properly diagnose a problem that isn't obvious or identify the actual cause for it. Also for opening up the suspension completely they were asking to keep the car overnight and labour charges of anywhere between Rs. 2500 - 4500 which would be payable regardless of whether or not a fault was found so I decided against it.

    What you describe is something I can have a shot at myself. Will report back on findings. Waisay out of interest, do you know where in Karachi I can get myself one of those floor jacks with the long handles? In recent months I've found its invaluable to have one of those at home. I've also been looking everywhere for the service manual for this car but to no avail. With the sheer number of Corollas on the streets one would've thought that someone would have shared the service manual on PW by now but it seems that no one has it. If you know where to get it I'm willing to pay for a copy!

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    @oahmed buy a pair of jack stands from Plaza market instead of hydrulic floor jack available at hardware market marriot road opposite SM Science college / Chamber of Commerce building Karachi.

    &quottuk" sound if brakes are engaged on downhill -1464369

    you can also pay a visit to Abdul Hameed & Sons and ask afzal to figure out the problem ( for free) & solution ( for an agreed price) for you
    - www.crackwheels.com - A skilled Dictator is much more beneficial to Country......than a Democracy of Ignorant people

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    Quote Originally Posted by capsat View Post
    @oahmed - jack up right front of the car rotate the wheel & check any play in spring loaded shock absorber, hold wheel with both hands try to feel any play in the suspension, one slight TUK down hill or while braking in reverse is most likely upper insulator as in picture has developed fracture

    &quottuk" sound if brakes are engaged on downhill -1463647
    You are right. It only comes while crossing speed breakers etc.
    But the sound which OP described is of calliper pins. I bet
    The best car safety device is a rear-view mirror with a cop in it.

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    2500-4500 labour chargers???
    Oh man these prices are insane.
    I gave 900 labour for front shock replacement, caliper pin replacement, balance rod bush replacement. 1 mechanic and his assistant worked 3 hours continuously.
    The best car safety device is a rear-view mirror with a cop in it.

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    Quote Originally Posted by waqar19 View Post
    2500-4500 labour chargers???
    Oh man these prices are insane.
    I gave 900 labour for front shock replacement, caliper pin replacement, balance rod bush replacement. 1 mechanic and his assistant worked 3 hours continuously.
    Yes imagine that. I mean, I can understand why parts are more expensive if you buy them from Toyota. You also have to pay GST to Toyota whereas you don't elsewhere so there's that as well. But their labour charges are completely unjustified. If they are unable to diagnose the problem based on my very detailed description thereof and a test drive by their own foreman (never understood why they call them that, isn't a foreman a supervisor/in-charge usually in respect of construction?), then why should I have to pay an exorbitant amount to them just so they can TRY to discover the cause of the problem? I mean, its not like they don't accept that there's a problem and its just my zidd. Their foreman heard the sound too. Its f*ing ridiculous to think that they can open up the suspension and put it back together and tell me "sorry, it's not the suspension" ... and I'd STILL have to pay them Rs. 4500!!

    But thanks for your advice. Will get another mechanic to look at the pins.
    @capsat - thanks, will look for those jacks next time I'm at Plaza.

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    with caution i can be sure of a fractured insulator as posted in the picture
    - www.crackwheels.com - A skilled Dictator is much more beneficial to Country......than a Democracy of Ignorant people

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    Quote Originally Posted by capsat View Post
    with caution i can be sure of a fractured insulator as posted in the picture
    I can safely second that... My civic also has this "tuk" issue and mechanic has diagnosed what capsat has mentioned.

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    My Baleno started giving this sound....Problem was solved by tightning bolts left side engine engine mount and lower bolts of shock absorbers..took 5mins for the job
    NiGhT ShAdE>>~

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    Guys thank you for all your input. Will have Afzal check it out over the weekend because insulators seem ok from a visual inspection.

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    So I finally got around to changing/servicing my brakes over the weekend. Since some contributors on this thread had advised me to check the brake caliper pins that was what I started with. The first thing I noticed was that the rubber bushings on them were more or less finished. The rubber was stuck in a way that I couldn't even remove the pins without tearing the rubber bushes completely so I let them be for the time being and just replaced the pads/applied grease to the back of the shims.

    Thought I'd ask around at Plaza for replacements for the rubber bushings but it seems that no one has them. Does anyone know where I can get those small rubber bushes? I'd like to remove the pins and lubricate them (have a tube of sil-glyde for the purpose) but then I'll need to replace the bushes too.

    BTW the noise I originally complained about (the "tuk" sound) has gone after replacing the pads. However I still want to grease those pins and replace the rubber before that becomes a problem.
    @capsat

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    ironically some parts are not available with reference to parts numbers or by explanation - remove one sample and goto saeed manzil shops lined with BVS Girls school boundary wall & at Longman shop you will have success
    - www.crackwheels.com - A skilled Dictator is much more beneficial to Country......than a Democracy of Ignorant people

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    best part is to drive and forget the tuk tuk noise when you hear the noise just ignore it
    -

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    i had same sound in my alto,it was a faulty chimta and a couple of bushes

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