Klank or Cracking Noise when pressing and releasing the Breaks - Page 2 - Kia Niro Forum
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post #11 of 21 (permalink) Old 02-05-2019, 09:23 AM
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Originally Posted by Griswald View Post
OK, so the sound is external. Here's what I have noticed about my Niros brakes. When the Niro sits for a short time, like overnight or in the parking lot at work, and there is a lot of moisture in the air (rain or heavy humidity) I get a noise that sounds like a grinding for a second when I start moving. I always assumed that it was surface rust being cleaned off the rotors by the disc brake pads. It only happens in wet conditions, thats why I figured it was rust.


Does yours act like that or is it something different?
It's not just when first starting out for me. I heard it a couple of times on my way to work today, always at low speeds. If I'm very gradually slowing to a stop I sometime heard a groan just as the cars rolls to a halt. Same thing when starting out at idle, like in a parking lot. I think it might be a resonance caused by very low brake pedal pressure. There's very little force on the pads and maybe at low speeds they or the caliper bracket can vibrate or shudder under those conditions. Again, I don't think it's a big deal or indicative of a problem, it's just a weird quirk.

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post #12 of 21 (permalink) Old 02-05-2019, 11:23 PM
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Originally Posted by nounounounou View Post
https://youtu.be/GmFrQGkTF2c

the exact noise I alwais have had on my cars for the last 10 years
if you have the same I would no worry


on the niro:


https://youtu.be/vBVnxowGJsI?t=425
Never heard that on any car I've ever owned (and I'm really glad I haven't had the experience). FWIW, I do creep ahead a few inches every day when I park in my garage. Car always wants to stop about a foot short of my target position, and then creep the remainder of the way.

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post #13 of 21 (permalink) Old 02-06-2019, 12:15 AM
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Quote:
Originally Posted by Griswald View Post
OK, so the sound is external. Here's what I have noticed about my Niros brakes. When the Niro sits for a short time, like overnight or in the parking lot at work, and there is a lot of moisture in the air (rain or heavy humidity) I get a noise that sounds like a grinding for a second when I start moving. I always assumed that it was surface rust being cleaned off the rotors by the disc brake pads. It only happens in wet conditions, thats why I figured it was rust.


Does yours act like that or is it something different?
EXACT same situation here! The dealer master tech told me that when it is wet/damp/moist that this noise is common. It happens to me EXACTLY as you described, when first starting out after sitting overnight, and in wet/damp conditions, but NEVER at any other time.............. also to the original poster,,,,,,,,,,, at slow moving speeds your REGEN braking should be doing most if not all of the braking with NO pad/rotor use.
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post #14 of 21 (permalink) Old 02-06-2019, 04:50 AM
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isn't the regen off below 10km/h? the eco needle doesn't go down in a ramp taken below that speed I assumed below 10km/h it is full pad+disk brake (I think I read it somewhere, and it has its logic )


when I notice this grinding noise first on my fist car more than 10 years ago I asked the dealer and the answer was that this is normal it depended of the friction material of the pads... never searched deeper than that...
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post #15 of 21 (permalink) Old 02-06-2019, 01:41 PM Thread Starter
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Originally Posted by jmurphEV View Post
The sound I've noticed is definitely not a relay opening or closing, it's more of a groan. I'd say it lasts around a second or so when just starting to roll. In fact the more I think about it I think it's most common when starting off slowly. If I release the brake gradually, like in a parking lot where I need to creep forward or backward, it feels like the car starts to apply power before the brakes are released which causes the noise. It could also be something in the rear suspension that either loads or unloads as the car starts to move with the brakes still engaged.

It makes sense the car would start to apply power as the brakes are being release to prevent it rolling. I'm not particularly concerned about the noise, it's just something I've noticed sometimes.
Yes sir thats whjat i was thinking too, the Hill Assist. The best thing i can describe it is that when you have a big piece of magnet and you let it go to stick with a metal, its most close to that sound. I am sorry I think thats the best i can describe it.
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post #16 of 21 (permalink) Old 02-06-2019, 07:24 PM
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Originally Posted by nounounounou View Post
isn't the regen off below 10km/h? the eco needle doesn't go down in a ramp taken below that speed I assumed below 10km/h it is full pad+disk brake (I think I read it somewhere, and it has its logic )
It is on for me until about 2 mph.

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post #17 of 21 (permalink) Old 02-07-2019, 01:27 AM
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What can I say? I live in a hot dry climate, but it's been cold and rainy here for the past week and I've been out and about in the rain. Haven't heard anything remotely similar to the "didgeridoo" kinds of sounds that nounounounou posted. I'm glad I haven't had that experience, and somewhat sorry for those of you who have. I'm accustomed to brakes making a lot of strange noises under different conditions, but that one's outside any experience I've ever had, including a lot of years driving other kinds of cars in Maine, Vermont, and also points south.

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post #18 of 21 (permalink) Old 02-07-2019, 06:07 AM
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Originally Posted by deltasmith View Post
What can I say? I live in a hot dry climate, but it's been cold and rainy here for the past week and I've been out and about in the rain. Haven't heard anything remotely similar to the "didgeridoo" kinds of sounds that nounounounou posted. I'm glad I haven't had that experience, and somewhat sorry for those of you who have. I'm accustomed to brakes making a lot of strange noises under different conditions, but that one's outside any experience I've ever had, including a lot of years driving other kinds of cars in Maine, Vermont, and also points south.

i didnt say (or didn't mean to say) it always does it I just say that I can reproduce it anytime... It never does it in town or normal driving unless parking in a very tight space with milimetric movements.


Practically, releasing a little the pressure or pressing a little harder on the break pedal is enough to stop it... it only does it entering in my garage with a steep ramp and very little room for the car so I have to move inch by inch...



it is a no problem for me and I just wanted to reassure the ones that have this that there is nothing to be worried about engine or motor... just brake noise
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post #19 of 21 (permalink) Old 02-14-2019, 03:52 PM
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a post from the ionic forum where they have same questions:
"Hi. I have finally found a solution to the brake noise. It happens to certain countries where if your country uses a brake pad 58101 G2A10 like mine ( so far i only find out UK, and Malaysia uses this model), it looks like in the pic below, which is flat, no slot and no chamfer.
https://ibb.co/bzR3VT0

If you are from the US, you will not be experiencing any brake noise because theirs are 58101 G2A00 which has a slanted slot like pic below
https://ibb.co/qxtwhsR

So, what i did, i changed to a third party compatible brake pad which has a slot and chamfer. No more noise. i used a normal frixa FPH37
https://ibb.co/yFBygLd

Hope that i've helped."


so here we are: diferent country diferent pads different issues
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post #20 of 21 (permalink) Old 07-18-2019, 10:58 PM
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grinding and metallic brake sound

At highway speed heard grinding noise coming from the rear of the vehicle. When moved forward or back from standing strong metallic sound was heard. Lifted the vehicle and strong metallic sound came from left rear wheel when turned in both directions.
Removed the wheel, loosened the brake disc and found rather large rock between the brake disc and the shield. Please see the attached picture.
After removal of the rock and installing the wheel the noise is gone.
It may not be a bad idea to check for foreign object in the brakes if you experience some strange noise in the brakes. The gap between the brake disc and the shield is relatively large especially near the calipers.
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