CPO Stinger Brake Vibration Questions

[itguy61]

I have read the entire faq posted above and searched and read several posts regarding this issue. I just bought a CPO Stinger GT2 and did not notice this until I had the car for about 150 miles. I have the issue with feeling a bit of vibration in the steering wheel on the highway when the brake pedal is tapped. Unfortunately for me the car has 12,500 miles so I know I am probably screwed on warranty. The issue of this not being taken care of on the CPO checklist is another issue.

I am going to try the Brake re-bed routine and see what results I get.

Has anyone done this and did it help the situation?

IF I have to have pads and rotors done does anyone know how long you wait before doing the brake bed procedure after new pads and rotors are installed?

Any help is greatly appreciated!

TC

 

[westcoastGT]

I have read the entire faq posted above and searched and read several posts regarding this issue. I just bought a CPO Stinger GT2 and did not notice this until I had the car for about 150 miles. I have the issue with feeling a bit of vibration in the steering wheel on the highway when the brake pedal is tapped. Unfortunately for me the car has 12,500 miles so I know I am probably screwed on warranty. The issue of this not being taken care of on the CPO checklist is another issue.

I am going to try the Brake re-bed routine and see what results I get.

Has anyone done this and did it help the situation?

IF I have to have pads and rotors done does anyone know how long you wait before doing the brake bed procedure after new pads and rotors are installed?

Any help is greatly appreciated!

TC

I've had several sets of ceramic brake pads installed on new BMWs due to the excessive dirt of their OEM pads , the bedding process should be done fresh , your dealer should be able to fix this under CPO ................good luck

 

[robz32]

You are still under the CPO warranty. They need to cut the brake disks.

 

[Helo58]

Upgrade your brake pads and try to get Kia to give you new rotors. If you use the stock pads after the fix, this could be an ongoing problem for you.

 

[itguy61]

Does anyone know what brand of aftermarket brake pads are recommended?

 

[Helo58]

Does anyone know what brand of aftermarket brake pads are recommended?

This is what is currently available. You will have to determine what works best for your needs.
FINALLY AFTERMARKET PADS FOR STOCK CALIPERS - KHARTUNERZ

 

[westcoastGT]

Does anyone know what brand of aftermarket brake pads are recommended?

there are several ceramic pads available , just research them , I liked Akebono https://www.tirerack.com/brakes/tech/techpage.jsp?gclid=CjwKCAiAy-_iBRAaEiwAYhSlA3BdvXNTGBbqstRH2jtEOlA-ErFctWvFTplW_asoOHtwgh-MkjzgHBoCfjcQAvD_BwE&techid=88&ef_id=CjwKCAiAy-_iBRAaEiwAYhSlA3BdvXNTGBbqstRH2jtEOlA-ErFctWvFTplW_asoOHtwgh-MkjzgHBoCfjcQAvD_BwE:G:s&s_kwcid=AL!3756!3!304510264048!b!!g!!&affiliate=IT2

 

[itguy61]

I ordered a set of Girodisc magic brake pads and I guess I will order a new set of stock rotors and see if this resolves this issue longer term. Looks like it will not be very difficult to switch out. Not up to a big fight with Kia and the dealer for a temporary fix.

 

[Helo58]

It shouldn't be a big fight. If you have resigned yourself to pay the costs yourself, it couldn't hurt to ask. You may be surprised at your answer.

 

[itguy61]

I ordered a set of Girodisc magic brake pads and I guess I will order a new set of stock rotors and see if this resolves this issue longer term. Looks like it will not be very difficult to switch out. Not up to a big fight with Kia and the dealer for a temporary fix.

After reading up on different types of Brake pad materials I am wondering if the Girodisc Brake pads are going to eat up rotors? Semi-metallic pads are more abrasive on average. I wonder if the stop tech pads would be better in this regard.

 

[itguy61]

Does anyone have a good handle on the cause of this issue? The compound of the brake pads? Dealer turned rotors today, did not charge me, resolved issue for now. I am wondering if I should put the Girodisc pads I ordered on, the will not be here until Friday. I am a bit concerned with them being semi-metallic and wearing out rotors much faster.

Just want to resolve the vibration issue.

 

[Helo58]

Does anyone have a good handle on the cause of this issue? The compound of the brake pads? Dealer turned rotors today, did not charge me, resolved issue for now. I am wondering if I should put the Girodisc pads I ordered on, the will not be here until Friday. I am a bit concerned with them being semi-metallic and wearing out rotors much faster.

Just want to resolve the vibration issue.

Without anything scientific to give you, the process of elimination and user experiences points to the pad compound being unsuited to use in the Stinger GT. This has been confirmed by users and car professionals as well.

In the big scheme of things, I wouldn't worry about rotor wear. Even if the new pads are more abrasive, I can't see them wearing rotors to the minimum thickness for a long time. Dealer cost on the rotors is around $100 bucks and they are easy to install. I would be more worried about the corrosion from the semi-metallic pads. They are going to be more corrosive than ceramic pads and you will notice the effect if you don't keep your wheels and brake calipers cleaned often. It will remove the finishes on both if left for long periods of time.

 

[itguy61]

That makes sense it is pad compound, my rotors did not feel warped. The dealers explanation of build up made more sense and the vibration only came through at Freeway speeds and was not that bad.

I am sure I have probably had semi-metallic pads on cars at some time in the past. Between the vw's, audi's, nissans and Mazda's in the past I would bet some had these on them. My main goal is to solve the build up issue and having to replace or repair rotors every 5-10K.

 

[eflyguy]

Any lingering deposit from the old pads will most likely be removed by the process of breaking in the new pads. You can repeat if needed.

 

[Helo58]

Any lingering deposit from the old pads will most likely be removed by the process of breaking in the new pads. You can repeat if needed.

It isn't the pad material on the disks that causes the problems. It is the formation of cementite in the rotor material caused by hot spots created due to the pad deposits. The formation of cementite is not limited to the surface of the rotor. Over time, it penetrates deeper into the rotor material until it is too deep to remove by resurfacing the rotors. A long term solution to the problem may require new rotors which is why I encourage those seeking a "dealer fix" to insist upon new rotors from Kia and purchase aftermarket pads. If the dealership is friendly and intent on resolving the problem, they may offer to install the pads as a courtesy during the rotor replacement.

 

[itguy61]

So I am gathering you are of the opinion that getting aftermarket pads will fix the problem of the deposits on the rotor which in turn cause the cementite formation?

 

[Helo58]

So I am gathering you are of the opinion that getting aftermarket pads will fix the problem of the deposits on the rotor which in turn cause the cementite formation?

I am of the opinion that getting aftermarket pads HAS THE POTENTIAL TO fix the problem of the deposits. If an aftermarket pad has the same properties as the stock pad, the outcome will be similar. The feedback is limited, but some who have purchased aftermarket pads have stated positive outcomes in related threads. This is the final piece of the puzzle in my opinion. We just need more feedback on the aftermarket pads currently available.

 

[eflyguy]

It isn't the pad material on the disks that causes the problems. It is the formation of cementite in the rotor material caused by hot spots created due to the pad deposits.

Interesting.. never heard of that. Not saying it's inaccurate, literally never came across this and have been a strong opponent of the "my rotors are warped" argument for many years.

Time to do more research. Feel free to share credible sources..

 

[Helo58]

Interesting.. never heard of that. Not saying it's inaccurate, literally never came across this and have been a strong opponent of the "my rotors are warped" argument for many years.

Time to do more research. Feel free to share credible sources..

Inspecting Brake Rotors

Cementite & Brake Rotors - Ford Truck Enthusiasts Forums

trackdayzone.com - The Final Word on Brake Vibration and “Warped” Rotors

https://oppositelock.kinja.com/brake-myths-what-to-expect-when-youre-expecting-to-st-1688020147

Stoptech used to have a great reference on it, but it seems that they have redesigned their website and all previous linked pages in the search no longer show up.

 

[Helo58]

I have been searching for the name for a while... People are turning their rotors using a conventional lathe. For high performance applications, this is inappropriate. What is needed, I have always called "centerless grinding," but in reading today, it is more properly called "Blanchard Grinding." That should provide some fun additional research that you will find interesting. It isn't necessary for more mundane applications and maybe overkill for a GT car, but for those seeking the best... it is the way to go.