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Front brake grinding with firm braking - 2012 elantra


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6fingers
Novice

Sep 3, 2017, 5:27 PM

Post #1 of 9 (562 views)
Front brake grinding with firm braking - 2012 elantra Sign In

Hi,

Recently purchased a used 2012 Elantra from a dealer, in as is condition. I was made aware that it did need brakes.

I had new pads, rotors, & wheel bearings installed by professional mechanic. After a few minutes of driving at moderate speeds, brakes grind when a firm braking is applied, just before the stop. We are now clueless. The grind does not happen in reverse nor does it happen when it is raining. The mechanic did try a different pad, to no avail.

After researching, I found other 2012 & 13 Elantra owners have experienced the same and some owners with new Elantras have even returned to the dealership under warranty, never finding a resolution.

Any ideas?


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 3, 2017, 6:19 PM

Post #2 of 9 (553 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

Could be an ABS event taking place. Maybe a wheel speed sensor is rust jacked cause a weak signal at slower speed causing the ABS controller to trigger an ABS event?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


6fingers
Novice

Sep 4, 2017, 10:40 PM

Post #3 of 9 (513 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

Thanks for the reply Discrete. That's a thought. I looked to see if I could disconnect the ABS but there are 3 fuses, abs 1, 2 & 3. I can remove 2 & 3 but abs 1 is included in a multifuse, So since I cannot remove the multifuse I am not sure if by removing 2 & 3 the abs will be fully disconnected.


(This post was edited by 6fingers on Sep 4, 2017, 11:05 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 5, 2017, 2:27 AM

Post #4 of 9 (501 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

Anything that puts the ABS light on shuts the system down.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



6fingers
Novice

Sep 5, 2017, 1:36 PM

Post #5 of 9 (474 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

Disconnected ABS, same problem.


6fingers
Novice

Sep 6, 2017, 9:44 PM

Post #6 of 9 (446 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

We've come to the conclusion that since there is no noise when it's wet outside or after the wheels had a chance to cool down, that the pads are becoming excessively hot, causing the noise... Any ideas?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Sep 6, 2017, 11:38 PM

Post #7 of 9 (439 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

Quote ">
After researching, I found other 2012 & 13 Elantra owners have experienced the same and some owners with new Elantras have even returned to the dealership under warranty, never finding a resolution.<"


I've seen this happen with WRONG wheels! With the pads/rotors new the body of a caliper can set farther towards part of the wheel it wouldn't hit it not for new thick pads and rotors - was once customer wanted different wheel trim and swapped wheels with the same car/vehicle just happened to have very slight different "dishing" depth dimensions/clearance for them to be new?
That would be seen as marks of rubbing on both caliper and inside the wheel if so. One I dealt with was so obvious (bought used wheels swapped by request) was fine with used brakes not new by me locked solid just putting wheels back on this one may just be able to rub upon a "firm" stop. You would see the evidence or they should since this really is up to who did it to figure out if wrong wheels figure out a solution if in fact wheels and OE check recalls or may need new wheels?

Said - happened just the once glad it was so obvious that time - wrong wheels right brakes in that case...the way they were made just off not the way wheels worked otherwise,
T

(Edit) Change was from alloy to steel wheel - swapped just millimeters different mattered!



(This post was edited by Tom Greenleaf on Sep 6, 2017, 11:46 PM)


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 7, 2017, 6:40 PM

Post #8 of 9 (418 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In

You could take a temp reading of the brakes when the problem is happening and when it isn't happening to see if that is a possibility. Usually when brakes get really hot they fade and you might notice brake pull.

An improperly finished rotor can cause a grinding or humming noise during breaking also.
Did this problem start right after the brake service?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Sep 7, 2017, 6:44 PM)


6fingers
Novice

Sep 7, 2017, 9:14 PM

Post #9 of 9 (399 views)
Re: Front brake grinding with firm braking - 2012 elantra Sign In


In Reply To
Usually when brakes get really hot they fade and you might notice brake pull.
An improperly finished rotor can cause a grinding or humming noise during breaking also.
Did this problem start right after the brake service?


Well there is no pulling. We bought the car used from a dealer, as is. We were told it would need front brakes. We heard grinding from the get go and assumed it just needed brakes. Changed the brakes, noise still there, replaced rotors, noise still there, replaced wheel bearing, noise still there, tried different composition pads, noise still there... Mechanic is going to check temp and also take measurements. Thanks for your input...






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