Squealing noise when I am driving

Tiny
CAR_TRAVELLER_2020
  • MEMBER
  • 2010 KIA RONDO
  • 2.4L
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Recently, I started hearing a squealing noise when driving. It will come and go, no particular pattern. It feels like it's coming from below the car, near the front.

When driving, it sounds like metal on metal (think train wheels on track sound). When I brake, the sound goes to something like a balloon letting out air.

I put the transmission in neutral, and the sound doesn't change.

High speed or low speed, no difference.

Mechanic doesn't know what it is. Any help would be greatly appreciated!

Thanks!
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Thursday, November 5th, 2020 AT 4:51 PM

10 Replies

Tiny
KASEKENNY
  • EXPERT
If applying the brakes makes it change then we chase that down. I would suspect the pads have something stuck in them or they are chattering. I assume that the noise is only there when you are moving? If so, this would be the stop cause.

Can you try to get a recording of it as well?

Here is a guide that will help in more general terms on these issues:

https://www.2carpros.com/articles/car-squeaking-noise

Let us know and we can go from there. Thanks
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Thursday, November 5th, 2020 AT 5:11 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Your description sounds like a brake sensor or brakes that need to be replaced. Does the sound change when you use the brakes?

Is it possible for you to record the sound and upload it for me to hear? Also, if you take a look at the attached pic, I circled the brake sensor I'm referring to. It is designed to touch the rotor and make noise before the brakes are totally worn.

Let me know.

Joe
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Thursday, November 5th, 2020 AT 5:13 PM
Tiny
CAR_TRAVELLER_2020
  • MEMBER
Hi. Thanks for the response! I have tried to upload a recording of the sound. Yes, the sound changes when I brake. It goes from something like "metal-on-metal" to more of a "air out of a balloon" when I brake.
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Thursday, November 5th, 2020 AT 5:16 PM
Tiny
CAR_TRAVELLER_2020
  • MEMBER
Here is the audioclip.
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Thursday, November 5th, 2020 AT 5:19 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The audio didn't attach. If, however, you hear it at the front and it changes when you apply the brakes, chances are the pads are bad. If you confirm that, here is a link that shows in general how to replace front brake pads and rotors:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

Here are the directions specific to your vehicle. The attached pics correlate with the directions. Note: The directions include the replacement of the rotors and caliper. You will need to inspect what is there to determine what is in need of replacement. I can help if you have questions.

______________________________________

2010 Kia Rondo L4-2.4L
Repair Procedures
Vehicle Brakes and Traction Control Disc Brake System Brake Pad Service and Repair Removal and Replacement Front Disc Brake Repair Procedures
REPAIR PROCEDURES
REMOVAL

1. Remove the brake hose bolt (B) and the guide rod bolts (C) from the caliper assembly (A).

pic 1

2. Remove the caliper assembly (A).

pic 2

3. Remove the pads (B), the pad shims (C) and the pad retainers (D) from the caliper bracket (A).

pic 3
4. Remove the caliper bracket (B) and the caliper mounting bolts (A).

pic 4

pic 5

5. Remove the brake disc (A) and the screw (B).

pic 6

NOTE:
Remove the brake disc from hub using M8 bolt (A) if the brake disc has been seized with the hub due to corrosion or overheat.
Be careful not to use the hammer. The disc can be damaged if you remove the disc from the hub by hammer.

pic 7

REPLACEMENT

CAUTION:
Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health.
- Avoid breathing dust particles.
- Never use on air hose or brush to clean brake assemblies.

1. Remove guide rod bolt (B) and raise the caliper assembly (A).

pic 8

2. Remove the pads (B), the pad shims (C) and the pad retainers (D) from the caliper bracket (A).

pic 9

INSTALLATION

1. Install the brake disc (A) and tighten the screw (B).

Tightening torque : N.m (kgf.m, lb-ft)
4.9 - 5.9 (0.5 - 0.6, 3.6 - 4.3)

pic 10

2. Install the caliper bracket (B) and tighten the caliper mounting bolts (A).

Tightening torque : N.m (kgf.m, lb-ft)
78.5 - 98.1 (8.0 - 10.0, 57.9 - 72.3)

pic 11

pic 12

3. Install the pad retainers (D) to the caliper bracket (A).
4. Install the brake pads (B) and pad shims (C) on the pad retainer correctly. Install the pad with the wear indicator on the inside. If you are reusing the pads, always reinstall the brake pads in their original positions to prevent a momentary loss of braking efficiency.

NOTE:
Check the foreign material at the pad shims (A) and the back of the pads (B).
Contaminated brake discs or pads reduce stopping ability. Keep grease off the discs and pads.

pic 13

5. Push in the piston using the SST(09581-11000) so that the caliper will fit over the pads. Make sure that the piston boot is in position to prevent damaging it when installing the caliper.

pic 14

6. Install the caliper assembly(A).

NOTE:
Be careful not to damage the piston pin boot.

pic 15

7. Install the brake hose bolt (B) and the guide rod bolts (C) to the caliper assembly (A).

Tightening torque : N.m (kgf.m, lb-ft)
Bolt (B) : 24.5 - 29.4 (2.5 - 3.0, 18.1 - 21.7)
Bolt (C) : 21.6 - 31.4 (2.2 - 3.2, 15.9 - 23.1)

pic 16

8. Refill the master cylinder reservoir to the MAX line.
9. Bleed the brake system.
10. Depress the brake pedal several times to make sure the brakes work, then test-drive.

NOTE:
Engagement of the brake may require a greater pedal stroke immediately after the brake pads have been replaced as a set. Several applications of the brake will restore the normal pedal stroke.

11. After installation, check for leaks at hose and line joints or connections, and retighten if necessary.

___________________

Let me know if that helps or if you have other questions. Also, if you can upload the audio, it may be helpful.

Take care,
Joe
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Thursday, November 5th, 2020 AT 5:32 PM
Tiny
CAR_TRAVELLER_2020
  • MEMBER
Hi Joe! Thanks again! I attached the audio above (I made a video of it). Should be able to hear the sound now. Question: why would there be sound when I am just driving (and not only braking) if it's the brakes?

Thanks so much! Really appreciate it!
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Thursday, November 5th, 2020 AT 5:36 PM
Tiny
CAR_TRAVELLER_2020
  • MEMBER
Here is the audio.
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Thursday, November 5th, 2020 AT 5:58 PM
Tiny
KASEKENNY
  • EXPERT
Thanks for adding that video. I agree with Joe. It is most likely the brakes. Even though you are not pressing the brakes, the pads are always dragging on the rotor. The caliper piston puts pressure on the pad to slow the rotor down but they are always touching each other so that is why you are always getting that noise when the brakes are not pressed.
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Thursday, November 5th, 2020 AT 6:39 PM
Tiny
CAR_TRAVELLER_2020
  • MEMBER
Thanks for the reply! And the helpful explanation?

Do you think it's an easy fix or an expensive one? I will most likely take it to my mechanic to check it out.

Thanks again!
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Thursday, November 5th, 2020 AT 6:58 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Chances are it is an easy fix. Simply replacing the brake pads. I provided the directions above for replacement. Please let me know if you have other questions or need help.

Take care,
Joe
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Friday, November 6th, 2020 AT 1:59 PM

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