Hey, who wants to help trouble shoot a car? (Brakes)

[Scanker19]

2016 Kia Forte

The what it?s doing:
at any speed when I brake is get a long groan. Not a grind or a squeal, but a groan. Almost metallic. At the end of the groan, or as I like to call it, when I stop, I can hear what sounds like fluid flowing or squishing.
It should be noted this noise is cyclic. 60% of the time it?s every time. It will go away for half a trip somewhere and then return at some point within the same day.

It needed brakes on the front so I replaced the rotors and pads. Inner pad on passenger side is asymmetrically worn. It was worn almost to the metal. While the outer pad had some life.

What I?ve done:
changed pads and rotors.
changed calipers
hub bearings seem okay.

what it?s not doing:
not pulling when braking.
was vibrating but the rotor change fixed that.
break pedal feels normal
stops As it always has.

[Wulf202]

Year make model?

Car, with disks up front is all I can tell so far. So that's 1970s or newer.

[Scanker19]

Year make model?

Car, with disks up front is all I can tell so far. So that's 1970s or newer.

I guess that would be super helpful.

[00tec]

Do you feel anything in the pedal when it happens?

[Scanker19]

No pedal feels pretty normal. It was vibrating, but after the pad and rotor fix that stopped.

[Wulf202]

Did you fully bleed the brakes after replacing the calipers?

[mb504]

Air in the brake lines? Maybe bleed them out?

[Scanker19]

I think I bled them out all the way. It was making that noise before I changed the calipers.

Funny enough o got a letter from Kia today saying that they issued a voluntary maintenance for corroded brake lines.

[zteknik]

Sounds like it can be an ABS issue, does the pedal hop and make noise when braking?- false abs activation- Is the pedal travel normal? Does it get squishy or does it feel hard when pressing? Check for vacuum leaks. That would cause the pedal to get hard, brake booster may have a leak. Is there signs of fluid loss? Loss of fluid can point to a leaky master cylinder. Separate master cylinder away from booster to see if fluid leaking into booster. Another thought can be the abs motor. Sometimes you have to do an abs bleed service procedure with a scan tool.
That's about the best I can do without actually putting hands or eyes on the vehicle.

[JohnnyEgo]

The fluid surging sound combined with no apparent issues with brake fade or squishy pedal feel makes me think it isn't brakes that are your issue. Brake fluid isn't very high volume compared to other fluids, and there isn't much space for it to even make surging sounds outside of the master cylinder and reservoir. If you had fluid low enough to make a surging sound in the master cylinder, I suspect you'd experience brake issues. Having said that, squishy feel is a sign of brake issues, usually air in the system.

Assuming it isn't the brakes, I'd consider what else might have fluid in it and be stressed under braking. Condensate drain tube blockage or air in the radiator or heater core circuit will cause a sloshy sound that you'd likely notice when braking.

[Scanker19]

No the pedal is fine and the car brakes and stops normally. No squislyiness no ABS hop or pulsing.

My main concerns was the old inner pad was worn very very unevenly from the outer pad. As far as I know that’s caused by a bad caliper or something up with the master cylinder.

The coolant was low today so I filled it.

I have an appt on Monday since Kia wants to replace some brake lines for the recall I got today.
I’m hoping that invovels replacing the fluid and properly bleeding them.

[Wulf202]

Probably just the caliper not sliding

[zteknik]

No the pedal is fine and the car brakes and stops normally. No squislyiness no ABS hop or pulsing.

My main concerns was the old inner pad was worn very very unevenly from the outer pad. As far as I know that’s caused by a bad caliper or something up with the master cylinder.

The coolant was low today so I filled it.

I have an appt on Monday since Kia wants to replace some brake lines for the recall I got today.
I’m hoping that invovels replacing the fluid and properly bleeding them.

Ok, like Wulf said - the caliper slide pins probably were sticking that and or the slides the pads were mounted to were not correctly lubricated. Thats the most common reason why the pads wear unevenly.

[SouthPaw]

I have an appt on Monday since Kia wants to replace some brake lines for the recall I got today.
I’m hoping that invovels replacing the fluid and properly bleeding them.

If they are replacing hoses, they will be exchanging fluid. As zteknik mentioned, it sounds like an ABS issue.

[eddiememphis]

The fluid surging sound combined with no apparent issues with brake fade or squishy pedal feel makes me think it isn't brakes that are your issue. Brake fluid isn't very high volume compared to other fluids, and there isn't much space for it to even make surging sounds outside of the master cylinder and reservoir. If you had fluid low enough to make a surging sound in the master cylinder, I suspect you'd experience brake issues. Having said that, squishy feel is a sign of brake issues, usually air in the system.

Assuming it isn't the brakes, I'd consider what else might have fluid in it and be stressed under braking. Condensate drain tube blockage or air in the radiator or heater core circuit will cause a sloshy sound that you'd likely notice when braking.

Agreed. Sloshing liquid won't be a brake fluid issue.

Without hearing the groaning it's impossible to diagnose. Your suspension components can make odd noises under braking because of weight transfer but are usually not a long sound.

Try to record the noise. Or drive by a shop. Ask one of the guys to step out for a second and have him listen as you pass. It is often easier to pinpoint a noise from outside the car.

[SideShow Bob]

Damn it !?????..
I had to read your title 3 times?? Since you separated Trouble & Shoot, I kept reading ? Who wants to SHOOT a car.?

Other than that, I got nothing.

[Wulf202]

No the pedal is fine and the car brakes and stops normally. No squislyiness no ABS hop or pulsing.

My main concerns was the old inner pad was worn very very unevenly from the outer pad. As far as I know that’s caused by a bad caliper or something up with the master cylinder.

The coolant was low today so I filled it.

I have an appt on Monday since Kia wants to replace some brake lines for the recall I got today.
I’m hoping that invovels replacing the fluid and properly bleeding them.

So you have a fluid sound and you lost fluid in a closed loop cooling system. I think that should be investigated more

[Erni]

Probably just the caliper not sliding

Uneven wear means this. The caliper pin or bolt is stuck or was improperly installed. The fact you had pulsing means the old disk was warped and usually caused by sticky caliper or pin.
Pull pin and inspect. May need new rubber but or rubber bit was installed wrong. Lube it right and reassemble. When the brakes are pressed and released the rubber bit pulls the caliper and pad back a smidge. The caliper piston pulls the other pad back. Tiny gaps on both sides.

[Jimmy]

Had a Dodge mini van that groaned when braking something fierce. The shop who did the work told my ex that the brakes are working properly. I tore them down, cleaned them up, and used Permatex Ultra Disc Brake Caliper Lubricant (the green stuff) on the caliper piston face, pad backing, and pins. Groan went away. I now use it on any disc brake job.

[BushMasterBoy]

I'd get a code reader and see if you can pull any codes or data from the OBDII. Maybe the dealer can run diagnostics on the ABS system. Could be a malfunction that isn't bringing up fault light on the dash. My Chevy Colorado started throwing ABS fault on the dash light. OBD reader said faulty sensor rotor /sensor on drivers side front wheel. I changed the hub with reluctor and I changed the sensor. Truck was pulling to the right under hard braking. Changed components mentioned and cleared the code. It fixed it. If the dealer won't run diagnostics, you might be able to get a loaner code reader from the big box part stores for free. Below is link to KIA Forte forum...

https://www.forteforums.com/threads/kia-check-engine-light-cel-codes.11832/

ABS Codes listed here. Chassis codes begin with a "C"

https://fdocuments.in/document/dtc-20-faq-kia.html

[Great-Kazoo]

Easy fix.

Jewish Lighting.

[zteknik]

Easy fix.

Jewish Lighting.Oy vay! [emoji1787]

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[crays]

I'd get a code reader and see if you can pull any codes or data from the OBDII. Maybe the dealer can run diagnostics on the ABS system. Could be a malfunction that isn't bringing up fault light on the dash. My Chevy Colorado started throwing ABS fault on the dash light. OBD reader said faulty sensor rotor /sensor on drivers side front wheel. I changed the hub with reluctor and I changed the sensor. Truck was pulling to the right under hard braking. Changed components mentioned and cleared the code. It fixed it. If the dealer won't run diagnostics, you might be able to get a loaner code reader from the big box part stores for free. Below is link to KIA Forte forum...

https://www.forteforums.com/threads/kia-check-engine-light-cel-codes.11832/

ABS Codes listed here. Chassis codes begin with a "C"

https://fdocuments.in/document/dtc-20-faq-kia.html

FYI: If you are planning to buy an OBDii code reader, basic (generally inexpensive) OBDii code readers typically do not access/clear ABS info. A more robust (expensive) reader is required. Will usually state if it does or not on the packaging.

[BushMasterBoy]

FYI: If you are planning to buy an OBDii code reader, basic (generally inexpensive) OBDii code readers typically do not access/clear ABS info. A more robust (expensive) reader is required. Will usually state if it does or not on the packaging.

I use a Blue Driver. Uses Blue Tooth on a Smart Phone. Reads ABS. Does live engine parameters. Website says you can check compatibility online before you buy. Saved me a few grand so far. YMMV

https://us.bluedriver.com/pages/bluedriver

[hurley842002]

I use a Blue Driver. Uses Blue Tooth on a Smart Phone. Reads ABS. Does live engine parameters. Website says you can check compatibility online before you buy. Saved me a few grand so far. YMMV

https://us.bluedriver.com/pages/bluedriver

I recently picked one of these up after my Honda threw a check engine code, great unit! Fortunately it was just the gas cap being funky.


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[BushMasterBoy]

I'm just wondering if the OP's problem is the ABS pump unit reservoir is having issues. It is basically a spring loaded cannister with a diaphragm, If it has issues it usually will make a groaning sound due to fluids in a faulty unit. Kind of like a ships hull when it is sinking and under hydraulic pressure. It will groan. When you have 5 trucks, a car, a motorhome, two boats and a jetski, you learn stuff. WTF was I thinking?