Brakes problem - please help

Discussion in 'Generation 4 - General Discusson' started by bezpon, Apr 18, 2017.

  1. bezpon

    bezpon SHO Member

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    Hi All,
    About a month ago I finally found and bought a certified fully loaded 15' MKS Ecoboost with then 15k miles. Now it's closer to 19k.
    The car is beautiful but over the last few weeks I think I discovered a problem with brakes. It's a weird one and I'm looking for some input from people who know these cars.

    Basically the brakes seem to be in perfect shape. There are no noises, no vibrations, nothing is wrong at any speed most of the time when driving normally. However when driven aggressively and fast I noticed that at some point I get some sort of thumping noise from the brakes and they feel like the rotors are warped.
    It happened 3 times so far but every time under the same conditions. I was driving fast on the highway with a lot of traffic and was using the brakes a lot. I'm talking about hard braking and acceleration several times in a row at highway speeds. First time it caught me by surprise but the other two times I tried to play with it. I discovered that when the problem starts I can press and release the brake and it will make the noise every time it's pressed. There's also a vibration going like if you have warped rotors. And it's loud. At that point If I let off the brake for 10 - 15 seconds, next time I'm braking everything is normal and smooth again. And the problem doesn't seem to come back untill the next time.

    It's almost like if the pads get to a specific temperature they just can't handle it if you know what I mean. And once they cool down a bit they are back to normal.
    I've never experienced this in a car before so I don't know if what I think is the actual reason. I would probably try replacing the pads with something more performance oriented but I don't know anything about the stock pads and I don't even know if this makes any sense so I don't want to start throwing money into it just yet.
    Any ideas?
     
  2. xFallenxCripplex

    xFallenxCripplex SHO Member

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    It's possible they are warping to high heat. Slits in the rotors help with that issue and also give the break dust a place to go.

    But odd you can create that much heat in the highway should take a race circuit to create that much.
    Sent from my Nexus 6P using Tapatalk
     
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  3. krewat

    krewat SHO Member

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    Are you sure it's not the ABS? Although, it doesn't "thump", but does cause what could be perceived as vibration.

    And by ABS, that could mean stability control too... Is the traction light blinking when this happens?
     
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  4. bezpon

    bezpon SHO Member

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    I am 100% percent sure it's not the ABS. I know what ABS feels like and it's not that.

    The heat theory is just a theory. I just could not come up with a better idea because it seems to be definitely related to high speed braking. So I thought, each pads are made for different operating temperatures. And normally the street pads temperature range is much lower than the performance pads range. So it could be that at some point I somehow get closer to their limit and they start to misbehave. But then I don't even know what kind of pads they use at the factory. Are these Ceramic? SemiMetallic?

    Unless there's something else going on but I thought that on 13' and up the brakes were upgraded and these cars don't have any brake issues.
     
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  5. krewat

    krewat SHO Member

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    The Taurus, and especially the Performance Package option, got better brakes. I'd be interested to hear from someone who knows if the MKS got anything.

    And by the way, what you describe could very well be a crack in one of the rotor vanes. I'm theorizing though.
     
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  6. 6500rpm

    6500rpm Quality Always Shoots Straight

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    Could be warped or hard spots on the rotors, and I've seen cases where a car has sat for a period of time and the rotors rusted different under the pads than the rest of the rotor. All will make a thump and associated brake pedal pulsation. All BUT the hard spots caused by excessive heat can be resurfaced. Fwiw, it's actually better in cases where the rotors don't have excessive wear to just have them resurfaced instead of replacing because they've been thermal cycled/stress relieved and are less likely to warp than a virgin rotor.
     
    Last edited: Apr 18, 2017
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  7. bezpon

    bezpon SHO Member

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    The problem is I've never seen warped rotors that only feel warped when they get hot. As I said 99% of the time they feel absolutely perfect.
     
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  8. Grouchy

    Grouchy SHO Member

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    I have 14th with 26k on it and have the same thing. I had it led at and the darker claimed they could not create it. I had this with a 05 I had and the rotors were warped. Dealer turned them and then resolved them. The difference was it was easier to recreate in the 05. I suspect the rotors are not well made.

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  9. Grouchy

    Grouchy SHO Member

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    Sorry the last post was so bad. This phone auto fixed spelling terribly.

    Sent from my SCH-I545 using Tapatalk
     
  10. SHOdded

    SHOdded SHO Member

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    Rotors rarely get warped nowadays, but it is possible. More likely it is the pads you need to replace. Perhaps police pads if already have PP pads. Rotors will need to be turned to bed properly with new pads.

    How many miles on the mks? Might want to get fluid flushed also if it has been sitting. Check hoses for bloat.
     
  11. 6500rpm

    6500rpm Quality Always Shoots Straight

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    Perhaps someone can check me on this, but I seem to remember having an issue like this on a duel piston caliper that had one of the pistons that was hanging up intermittently. If memory serves me correctly the telltale was that it caused the pad to wear tapered due to the one piston not retracting.
     
  12. bezpon

    bezpon SHO Member

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    Ok. So I think I'll ask the dealer to look at the brakes at next oil change but looks like I should count on new rotors and pads. So as far as rotors go - I'll probably just get OEM without thinking too much.
    What about pads? Should I get the Taurus PP pads? I think the part number is FU2Z2V001D
    Will these fit into my stock MKS calipers?
     
  13. mrhighcaliber

    mrhighcaliber SHO Member

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    Yep they fit. Same setup as the Taurus sho 2013+. I do believe the pp pads are a semi metallic pad formulation as opposed to the ceramics that come standard on everything.

    Sent from my Nexus 6 using Tapatalk
     
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  14. Chris Horner

    Chris Horner SHO Member

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    I had the exact same problem @bezpon and I know the 'feel' you're talking about. If I was driving at spirited highway speeds and had to slow down quickly, or especially getting off the highway on an off ramp and needing deceleration from high speeds, this exact same thing happened and only under those conditions. Not too long after that I discovered the front pads were almost completely gone (I have a 2012 SHO with PP for reference - bought used, not sure if it still had original parts or not) I know the pads created incredible amounts of brake dust. I switched to a higher performance pad and rotor (TBH not sure of the specs) and flushed out the brake fluid. The car stops night and day better now, I do not have re-occurrence of this problem, and the brake dust problem is history. Brakes were never the strong point on these cars to begin with and I think it's relatively easy to overwhelm the stock parts.
     
  15. Ahrmadillo

    Ahrmadillo SHO Member

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    i have a 2015 non pp and the original motorcraft rotors are complete trash i have gone through 2 sets within a year due to them being warped from high heat you could see the discoloration on the rotor. i just ordered a stop tech complete kit with slotted rotors for almost $500. i will never buy the motorcrafts again they failed from one event of heavy braking to avoid an accident. you would think with huge brakes and using DOT4 fluid ford would design better rotors.
     
  16. SHOinVa

    SHOinVa SHO Member

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    I have been looking at different brakes for awhile, this is the first time I have seen the name "Stoptech" come up, do you have any experience with this brand and which kit did you order, I don't see one listed on there web site for a Taurus SHO. Let us know how it works out.
    Charlie
     
  17. SHOdded

    SHOdded SHO Member

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    No kits that I could find unless a retailer has put some together.
    Stoptech 2010 & 2013 Taurus Rotors & Pads.jpg
     
  18. Ahrmadillo

    Ahrmadillo SHO Member

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    IMG_1391.JPG IMG_1392.JPG IMG_1394.JPG IMG_1396.JPG Sorry guys I've been busy but I also wanted to test the stop tech kit before telling you guys about it. The part number is 934.65077 I got my kit from AutoAnything I've also seen the kit on Carid. The kit is great obviously easy install to anyone that done brakes before. Some tips for the rear calipers you'll need the special tool to retract the piston in the caliper, but you'll need a c clamp to put pressure on the piston. I also painted the calipers. As for the performance there really isn't any difference for $500 a $125 a corner it's a good kit to replace your old brakes and give it a good look. Also is a picture of my old motor craft rotors that were damaged
     
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  19. brutschea

    brutschea 2010 sho

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    Why do all the boards say you must rotate the passenger side caliper in counter-clockwise.
    It took forever back and forth to realize that I was fighting myself trying to rotate it that way.
    Both sides go back clockwise.
     
  20. mrhighcaliber

    mrhighcaliber SHO Member

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    I'm running stoptech slotteds and I love them. Stay away from ceramic pads unless brake dust mitigation is of a higher importance to you than stopping performance and rotor longevity.

    Sent from my Nexus 6 using Tapatalk
     

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