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How long does it take to replace brake discs and pads?

Discussion in 'Personal' started by SleighBelle, Feb 15, 2016.

  1. SleighBelle

    SleighBelle Occasional commenter

    My brakes have been a bit squeaky on and off for about a fortnight and today I had to emergency brake for some delightful cyclist who didn't think the traffic lights applied to him. I've taken a short journey and the brakes seemed okay until I was just coming into our road when they made an awful grinding noise.

    Tomorrow, I'm meant to be driving for four hours in the evening. Would I be able to go to a Kwik Fit or similar and get the brakes seen/ replaced tomorrow? I'm assuming the grinding noise means I will need new discs as well... or am I jumping to conclusions?

  2. magic surf bus

    magic surf bus Star commenter

    Only Kwik Fit can give you an exact time but they ought to get it done well before the evening if you get there in the morning. Just don't expect them to sort it instantly - take a colouring book to keep yourself occupied while you're waiting :)
  3. dumpty

    dumpty Star commenter

    In your case it has to be best to use a garage you know you can trust. You could just need the brake fluid changed - 20 minutes and probably 20-30 quid. But the temptation to change that and the pads, discs could be too much for some garages, especially if they feel you have given them a blank cheque. Kwik- Fit do specialise in this work but have a reputation of doing exactly the above. Google is your friend.
  4. jacob

    jacob Lead commenter

    DON'T GO TO KWIKFIT. They will rip you off. It shouldn't take more than an hour to do the job btw.
  5. colpee

    colpee Star commenter

    You might be. A grinding noise could be as simple as a bit of gravel stuck in there and squeaking could be one of a couple of things. Brakes can squeek if they get slightly corroded, likely if you don't drive very much.

    I would be tempted to consider the brakes in the light of response to the emergency stop, and if that was ok, do the long drive and use the brakes. But if it is worrying you, get get them checked for the slight squeak from somewhere reputable - the job won't take long if it needs fixing; getting the right part for a particular car sometimes takes a few hours.
  6. T0nyGT

    T0nyGT Lead commenter

    Please, please don't go to Kwik Fit. You might as well just burn your money. Not only do they rip you off but they also take an entire day to do it (because they're inundated for some strange reason)
  7. old_dobbin

    old_dobbin Occasional commenter

  8. armandine2

    armandine2 Established commenter

  9. Alf58

    Alf58 Established commenter

    Grinding noise can mean worn out brake pads rubbing on the brake disk. You should get your brakes checked by a professional before you go on a long journey if you have concerns.
  10. armandine2

    armandine2 Established commenter

    The issue is usually damaged rotor/or not
  11. Duke of York

    Duke of York Star commenter

    The simple answer to how long it takes is about an hour at most when they've got all the equipment the job requires and that includes having a tea break and the chance to discuss whether this year's Pirelli calendar is better or worse than last year.

    Home mechanics fret over stuff that professional mechanics never have to contend with. An example being that as soon as the car's jacked up and the wheel is off, the dog will urgently need to be taken for a walk to relieve itself. On the way it will meet another one, which will involve the task of separating them, then finding your dog is covered in car grime and needs to be bathed before it can be allowed a free run of the house.
  12. emilystrange

    emilystrange Star commenter

    there speaks the voice of experience.
    les25paul likes this.
  13. jacob

    jacob Lead commenter

    Brake pads that have run out of friction material make a godawful grinding noise and would not necessarily mean a disc change if not allowed to continue. I could probably do discs and pads in a couple of hours but it would invovle swearing, groans, grunts and possibly a pee break (its cold!). If I had the proper garage equipment like hydraulic ramp and air tools so I didn't have to grovel around on the floor I could do it in half the time.
  14. irs1054

    irs1054 Star commenter

    I had a case of a graunching noise from the brakes coming back from a long trip. It turned out to be a safety feature. A small piece of metal attached to the pad that made contact with the rim of the disc when the pad wore down below it's minimum. The noise then attracted attention to the problem.

    The issue here is getting a garage you can trust. Several Which investigations have demonstrated that an awful lot of garages simply cannot be trusted to do a good job at a reasonable rate. Kwikfit fell foul of BBC's Watchdog over their policy of putting nitrogen into tyres rather than air and then charging for it but not actually doing it.

    If you can find a garage with a decent staff whom you can trust then it is probably a case of sticking with them and passing the info onto friends etc so they get more business. Also any place that causes problems, make it known. (by word of mouth)

    Pads wear down in around 40,000 miles if you don't make a habit of jumping on the brakes. Discs will usually last about twice that, they will usually have a wear limit 2mm thinner than their original thickness. Pads can wear unevenly which will mean replacing sooner. Discs can get scored, wear unevenly or warp, all of which mean replacement. Brake calipers can suffer from stuck or rusty pistons or siezed support pins which, if not careful, can mean a new caliper. Breaking off a bleed nipple can also mean a new caliper.
  15. Jolly_Roger1

    Jolly_Roger1 Star commenter

    At the risk of getting shot down as a bodger, might I suggest a light 'hiss-over' with WD40, possibly using the little tube to direct the lubricant into the right spots.
  16. jacob

    jacob Lead commenter

    Nitrogen is not required. Air is 78% nitrogen, for road use it is good enough. Even racing cars and bikes don't really need it.

    Some people can get through brake pads way quicker than 40,000 miles. Especially some automatic drivers who rest their left foot on the brake pedal and thus wear the brakes slightly all the time.
  17. oldsomeman

    oldsomeman Star commenter

    Jacob why do some firms then insist on nitrogen i tires. i was looking at a RV site in America and they insist their tires are filled with nitrogen and not air?
  18. irs1054

    irs1054 Star commenter

    There is a theoretical advantage to using nitrogen because it contains just one type of molecule and so the elastic properties are more linear. Also it does not change as much when it heats up. Gas shocks use nitrogen because of this. Also nitrogen is far less soluble so the oil in the shocks won't foam as much.

    In tyres nitrogen won't contain water vapour and oxygen which can degrade the tyre and the wheel. In practice, I very much doubt the difference is measurable let alone noticeable in normal use.
  19. jacob

    jacob Lead commenter

    I said that. The "physics" of it is very dubious. 4/5ths nitrogen vs 100% nitrogen, you wouldn't notice the difference.
  20. les25paul

    les25paul Star commenter

    Assuming there are no problems a skilled machanic should be able to change a set of pads in about 15 minutes using all the corect tools. I've done it on a motorbike in about 30 mins which includes taking the wheel off, greasing parts with cooper grease and losing the circlip (and I'm no trained mechanic),

    Changing the disk itself should also be a short job for a fully equiped and trained mechanic. It took me half a day on the same motorbike because I didn't have the correct tools and snapped a bolt. I ended up taking the wheel to a motorcyle machine shop to get the disk off. "Oh everyone does that" said the cheery shop owner "The bolts are glued in and you need to gradually apply pressure using air tools" Only cost me a fiver though .

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