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New brake pads and discs - Hot wheel(s)!

  • 10-08-2012 12:36pm
    #1
    r3nu4l
    Registered Users, Registered Users 2 Posts: 17,399 ✭✭✭✭


    So I had a car service on Wednesday and had new brake pads and discs fitted to both rear wheels.

    My commute home is about 35 mins, 95 percent of which is all high quality dual carriageway. Yesterday, I was driving home and stopped at some traffic lights close to home and as I was looking in my driver's side mirror I noticed what appeared to be smoke coming from the rear wheel. I then thought that it must have been exhaust fumes but checked when I got home.

    As I approached the driver's side rear wheel I could feel incredible heat from it. I could just about touch the alloy it was so hot. No such problem on the nearside wheel that also had pads and discs replaced. Or with any of the other wheels. They were warm but not searingly hot!

    I drove into work this morning and didn't feel any unusual heat from any of the wheels.

    Anyone got any ideas what could have caused this?


Comments

  • #2
    r3nu4l
    Registered Users, Registered Users 2 Posts: 17,399 ✭✭✭✭r3nu4l


    OSI wrote: »
    The smoke is pretty normal on a new set of pads. Not so sure on the heat front though, but I wouldn't say it was overly worrying.

    It's just that it was one wheel only that was so hot, the other was normal. I was wondering if perhaps the brakes weren't disengaging properly and there was friction? That said, fuel consumption seemed to be pretty normal this morning anyway. Not sure about yesterday when the problem was happening. I needed fuel but didn't check my consumption figure for the trip.


  • #3
    slimjimmc
    Registered Users, Registered Users 2 Posts: 7,786 ✭✭✭slimjimmc


    OSI wrote: »
    The smoke is pretty normal on a new set of pads. Not so sure on the heat front though, but I wouldn't say it was overly worrying.

    In all the cars I had over 25yrs I never ever saw smoke coming from new pads or discs :confused:

    Any chance a piston or the handbrake adjuster is stuck?


  • #4
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    That's a binding brake caliper - it needs immediate attention, and the pads (and probably disc) on that wheel will need to be replaced.


  • #5
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    OSI wrote: »
    Surely he would feel this through the wheel though. If it was a back wheel I could understand, but a binding front wheel she be pretty obvious.
    It's a rear wheel. :)


  • #6
    MetzgerMeister
    Registered Users, Registered Users 2 Posts: 19,885 ✭✭✭✭MetzgerMeister


    If it's only from one wheel, this would tell me that the caliper is seized therefore isn't releasing from the disc.

    Is there a greater amount of brake dust on this one alloy compared to the rest?


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  • #7
    r3nu4l
    Registered Users, Registered Users 2 Posts: 17,399 ✭✭✭✭r3nu4l


    I'll have to check all of this on my way home. As I say, nothing this morning which may indicate that the problem has resolved itself but have to give Audi a call nevertheless.

    EDIT: I never felt anything from the steering either and the front brakes weren't touched at all anyway.


  • #8
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    r3nu4l wrote: »
    I'll have to check all of this on my way home. As I say, nothing this morning which may indicate that the problem has resolved itself but have to give Audi a call nevertheless.

    EDIT: I never felt anything from the steering either and the front brakes weren't touched at all anyway.
    Even if it never comes back it will have done damage - the pads & disc on that wheel will need to be replaced. I'm no mechanic, but i'd also expect that the brake fluid should be changed?


  • #9
    goz83
    Registered Users, Registered Users 2 Posts: 8,035 ✭✭✭goz83


    Get it checked just to be safe. The caliper may have stuck a bit and is now resolved, but the pads alone would be worn from this. Get the discs checked too.


  • #10
    r3nu4l
    Registered Users, Registered Users 2 Posts: 17,399 ✭✭✭✭r3nu4l


    Booked in for 8.30 tomorrow morning.

    So when my garage trots out the 'no damage done' line, how do I get evidence of that?


  • #11
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    Again i'm no mechanic, but driving for any kind of period at high speed with a brake even lightly applied has to wear the pad, wear and overheat the disc, and quite possibly cook the brake fluid? I'd be much happier if a mechanic from here confirmed this, but I can't see how it wouldn't be the case.


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  • #12
    keithclancy
    Registered Users, Registered Users 2 Posts: 9,208 ✭✭✭keithclancy


    Possibly that they didn't clean the hub (if its a floating disc) before putting the new discs on, would mean the Discs are rotating at an angle in the Caliper, would cause a lot of heat as you described.

    Just jack the car up and rotate the wheel, if its making a rubbing noise then thats the problem.


  • #13
    Ardennes1944
    Registered Users, Registered Users 2 Posts: 9,238 ✭✭✭Ardennes1944


    either way something is wrong. you paid for the service and something is not right so i would be bringing it back asap


  • #14
    keithclancy
    Registered Users, Registered Users 2 Posts: 9,208 ✭✭✭keithclancy


    Ardennes1944 wrote: »
    either way something is wrong. you paid for the service and something is not right so i would be bringing it back asap

    True, but it would save the OP time to check rather than going in and getting some bull$hit "oh that means its bedding in" excuse.


  • #15
    Nissan doctor
    Closed Accounts Posts: 8,223 ✭✭✭Nissan doctor


    What type of car is it?

    If the caliper seals are anyway damaged then the action of winding back the pistons to fit the new pads can push dirt back into the caliper and cause it to stick. Its likely to be something like that causing the problem here if its only on one wheel.

    As for the pads or brake fluid needing changing..that depends on how badly overheated they were. The brake fluid should be changed every 2 years anyway so depending on when this was done last it may or may not be wise to change it.
    The pads themselves are unlikely to have worn any significant amount but may well be glazed which a rub of sandpaper would solve.

    The problem will be getting an impartial opinion from the garage who did the work but if they are reputable they should look after it for you IMO.


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