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I had the front brake pads and rotors done?

Tiny
WALLY AB
  • MEMBER
  • 2013 KIA RIO
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 63,000 MILES
I have had this car for around nine months. I noticed that sometimes when I press on the brake pedal it takes a little longer to engage or I have to press harder for them to engage and it almost locks up. I had the front brake pads and rotors done at Canadian tire right before I bought it and I replaced the rear pads and rotors myself in the summer, making sure the slide pins, shims and hardware was greased, and moving properly.

Is this anything to worry about? The brake fluid is clean, and as far as I know, the system has never been opened.
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Friday, October 19th, 2018 AT 9:29 PM

14 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi and thanks for using 2CarPros. Com.

That is an odd one. Since there seems to be a delay or if you press harder it over compensates, I have to ask a question. When you release the brakes, do they release as they should? Does there seem to be any excessive play in the brake pedal?

Let me know.

Joe
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Saturday, October 20th, 2018 AT 7:38 PM
Tiny
WALLY AB
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When I release the brakes its fine. It does not stick. However if I go on a ride, I will get the occasional brakes feeling like they are not engaging that well, it will still slow the car down, but not as quick as it usually does. Many times it will do that, then grip harder with the same brake pressure. To me it seems odd. The car has been like this since I bought it, but now it seems to do it worse. I never opened the system at all, I just moved the reservoir a tiny bit trying to check for leaks previously around it and opened the cap. None were present. I do not even see any seepage from the grommets or anything underneath.

Last I checked the front brakes maybe a month and half ago because I was hearing a little grinding in the front. Checked and pads looked brand new.
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Saturday, October 20th, 2018 AT 9:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
I hate to even ask this, but does it have rear drum or disc brakes?
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Sunday, October 21st, 2018 AT 4:56 PM
Tiny
WALLY AB
  • MEMBER
  • 97 POSTS
No, it is disc all around.
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Sunday, October 21st, 2018 AT 6:16 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
The only other thing that I can think of that could cause an issue is the brake booster vacuum pressure switch. In order to ensure adequate brake power assistance in every situation, the brake booster is equipped with a partial vacuum sensor. The brake booster vacuum pressure sensor is located beside the brake booster. Pictures 1 - 4 show the sensor and location information. There is a test procedure, but it requires specialized tooling. Here are the directions. The last two pictures correlate with these directions.

COMPONENT TESTS AND GENERAL DIAGNOSTICS
Inspection

1. Check installation status of BBVPS and Vacuum hose or damage of vacuum hose.
2. Connect GDS to DLC (Data Link Cable).
3. Warm up the engine to normal operating temperature.
4. Monitor "BBVPS" parameter on GDS.
Fig.1) Idle Status
Fig.2) Brake pressure signal

NOTE:
With a brake partial vacuum that is too low, the ISG function also starts without activity on the part of the driver.
Insufficient brake partial vacuum can lead to safety risks during braking maneuvers, when rolling on an incline. To prevent this, the engine is started.

I hope something here helps.

Let me know,

Joe
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Sunday, October 21st, 2018 AT 6:53 PM
Tiny
WALLY AB
  • MEMBER
  • 97 POSTS
I dont think my scanner has the ability to show booster vacum pressure. I have one for generic obd2 engine codes, and another for srs/tcs, and airbag codes.

Anyways, I ran fresh fluid through the system and bled them using the procedure specified by kia. Still feels the same.

Could it be related to a proportioning valve?
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Monday, October 22nd, 2018 AT 8:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Welcome back:
The proportioning valve regulates pressure between the front and rear brakes. Honestly, I do not think that would cause it. The sensor, on the other hand, regulates the boost pressure which can definitely cause what you described. I have a feeling that may be the issue. You may want to have it scanned by a shop that has the right scanner.

Joe
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Tuesday, October 23rd, 2018 AT 5:06 PM
Tiny
WALLY AB
  • MEMBER
  • 97 POSTS
Is there a possibility it could be brake fade from the front friction material?
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Monday, October 29th, 2018 AT 2:55 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Welcome back. That is a term I have not heard in years. Brake fade is the result of brakes overheating and lessening the effectiveness of friction. The result, it feels like you partially lose your braking ability. Way back in the 1960's and prior, most cars came with four wheel drum brakes. That is when brake fade was a big issue. With the addition of front disc brakes, the problem was not totally but mostly eliminated.

Unless this only happens under conditions when the brakes get extremely hot (long hill, high speed stops.) I do not think that is it.

Have you tried the sensor?

Let me know,
Joe
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Monday, October 29th, 2018 AT 5:36 PM
Tiny
WALLY AB
  • MEMBER
  • 97 POSTS
I do not have the ability to test the sensor with my scanner. Do you know any apps I can use to scan the vacuum pressure sensor?
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Monday, October 29th, 2018 AT 6:57 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Honestly, I do not know if any. I wish I had an easy answer.
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Monday, October 29th, 2018 AT 9:04 PM
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2006 KIA RIO
  • 10,600 MILES
Lost the brake pads out of the rear can I get repair instructions
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Monday, February 8th, 2021 AT 1:51 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

Replacement isn't too hard. First, here is a link that shows in general how to replace brake pads and rotors:

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

You can use the link as a guide.

Here are the directions specific to your vehicle. The attached pictures correlate with the directions.

__________________________________

2006 Kia Rio L4-1.6L
Rear
Vehicle Brakes and Traction Control Disc Brake System Brake Pad Service and Repair Procedures Rear
REAR
REAR DISC BRAKE

COMPONENTS

pic 1

REMOVAL
1. Raise the rear of the vehicle and make sure it is securely supported. Remove the rear wheel.
2. Release the parking brake.
3. Remove the guide rod bolt (A). After, raise the caliper assembly (B), and support it with a wire.

pic 2

4. Remove the pad shim (A) and pad assembly (B).

pic 3

INSTALLATION
1. Install the pad retainers (A) to the caliper (B).

pic 4

2. Check the foreign material at the pad shim (A) and the back of the pads (B).

pic 5

3. Contaminated brake discs or pads reduce stopping ability. Keep grease off the discs and pads.
4. Install the brake pads (B) and pad shim (A) on the caliper bracket.
5. If you are reusing the pads, always reinstall the brake pads in their original positions to prevent a momentary loss of braking efficiency. Push in the piston using 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 pivoting the caliper down.
6. Pivot caliper down into position. Being careful not to damage the pin boot, install the guide rod bolt (A) and tighten it to the specified torque.

pic 6

7. Install the brake caliper.
8. After installation, check for leaks at hose and line joints and connections, and retighten if necessary.
9. 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 pedal will restore the normal pedal stroke.

__________________________________

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe
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Monday, February 8th, 2021 AT 1:51 PM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Here is the information you requested for rear brake pad replacement and brake rotor replacement . This is a tutorial for you to view on how to change rear brake pads and rotors:

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

I've attached picture steps below on how to change the rear brake pads on your vehicle. Hope this helps and thanks for using 2CarPros.
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Monday, February 8th, 2021 AT 1:51 PM (Merged)

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