Steerin Wheel shaking after new rotor and pads

[Martin T]

Hi i have kia stringer 3.3 t 2020 my car shakes when i brake at high speed . Mechanic told me that i need to change front left rotor and pad but i already did it (with oem part's)twice and didnt drive it even 6000 miles. Can you guys help me to find solution on that?
Thanks.

 

[Ohiocruiser]

I belive you always need to change both sides, left and right. Also a lot of people are having a vibration brake problem with oem pads. Going with aftermarket pads seems to be solving the problem.

 

[Martin T]

I belive you always need to change both sides, left and right. Also a lot of people are having a vibration brake problem with oem pads. Going with aftermarket pads seems to be solving the problem.

I changed both sides with oem parts,But I'm still facing this problem, even the experts at the service can't find the reason.(

 

[Martin T]

I belive you always need to change both sides, left and right. Also a lot of people are having a vibration brake problem with oem pads. Going with aftermarket pads seems to be solving the problem.

and, after testing the car a few times we found that the rotor was bent again only on the left side

 

[bfglitch]

If you're using OEM pads, and the vibration comes back after a period of time, it's due to pad deposits being unevenly left on the rotors making it feel like the rotors are warped. It's a very common problem on the stinger. Most people have solved it by using aftermarket pads. There's numerous threads here on the issue.

 

[Buzzman12]

Lots of threads and talk about this. Go with after market pads for sure is what I'm reading.
I just bought my Stinger a few months ago, and ordered EBC reds for the front. Will be switching them out soon.
Here's a (long) thread on the subject, but might be worthwhile scanning through.

Stinger Brake Pads Replacement

I've just approached 46K km and the front pads are due for a replacement soon... The dealer quoted me a price for the front pads at $900 (offered a discount from $1,300). I haven't had any issues with the OEM Brembo pads but based on other threads, I'm looking to replace them with aftermarket...

stingerforum.org

 

[Martin T]

If you're using OEM pads, and the vibration comes back after a period of time, it's due to pad deposits being unevenly left on the rotors making it feel like the rotors are warped. It's a very common problem on the stinger. Most people have solved it by using aftermarket pads. There's numerous threads here on the issue.

So can the pads bend the rotor?

 

[bfglitch]

So can the pads bend the rotor?

Are the rotors TRULY warped or do they believe they're warped due to the vibrations?

Lots of people believe the rotors are warped because of the vibrations they feel due to the deposits left on the rotors. It's extremely rare to really warp rotors. Also the OEM rotors are pretty well designed. There's even a guy on here that uses them in his auto cross events which undergo a whole lot more stress than what you're probably putting on them on the street.

Here's another very long thread that goes over it FAQ: Vibration under braking: warped rotors? NO!

 

[Volfy]

Your pics are low resolution, so can't really tell what's going on, but that middle pic looks like the rotor has heat-spotted. You can almost see the "ribs" showing through the rotor wearing surface. That happens because when the rotor get really hot, the areas that are tied to the vent ribs underneath get hotter. This is because those areas do not benefit from the axial cooling air flow cannot cool as well as the areas between the vent ribs. Once your rotors have heat-spotted to a severe enough degree, their structural integrity is compromised and you'll start experiencing problems, including vibration.

Not clear on the exact history of how you run your brakes and when you did what, so cannot tell what exactly happened. It is possible that uneven brake pad material deposits caused the hot-spotting. Again, it's impossible for any of us to tell from a few grainy pics. A lot can happen in 6000 miles.

 

[Martin T]

When i changed rotor first one they put on was shaking to i didnt drive it a mile

 

[Martin T]

Your pics are low resolution, so can't really tell what's going on, but that middle pic looks like the rotor has heat-spotted. You can almost see the "ribs" showing through the rotor wearing surface. That happens because when the rotor get really hot, the areas that are tied to the vent ribs underneath get hotter. This is because those areas do not benefit from the axial cooling air flow cannot cool as well as the areas between the vent ribs. Once your rotors have heat-spotted to a severe enough degree, their structural integrity is compromised and you'll start experiencing problems, including vibration.

Not clear on the exact history of how you run your brakes and when you did what, so cannot tell what exactly happened. It is possible that uneven brake pad material deposits caused the hot-spotting. Again, it's impossible for any of us to tell from a few grainy pics. A lot can happen in 6000 miles.

When i changed rotor first one they put on was shaking to i didnt drive it a mile

 

[GT Elite]

I agree that there is not enough information to really figure out what is going on. By “bent”, we are assuming that the rotor is warped. Has the rotor runout been checked with a dial indicator? If that middle picture is the current rotor, it looks like it has been severely heat soaked and I agree with has already been said that it is no longer serviceable. It needs to be replaced. What we do not know is how it got so hot. This could happen if the pads are not moving back when the brakes are released and they are stuck against the rotor.

 

[Daniel @ K8 Stinger Store]

Hey @Martin T,

We have had nothing but issues with OEM Pads on our shop Stinger.

We heard about this braking issue early on so we designed pads to target this issue and other things people had complained about like excess brake dust and squeaking/clunking.

Ever since we put our pads (K8SS Elite Sport Ceramic Brake Pads) on the Stinger, we haven't run into any issues. I hope this helps, let me know if you have any further questions!

 

[D.J.]

and, after testing the car a few times we found that the rotor was bent again only on the left side

you found the rotor bent? or you had brake pulsations?

 

[D.J.]

So can the pads bend the rotor?

no

it is more likely that the OEM pads have left pad deposits on the rotors, causing brake pulsations.

I went through 4 fult sets of rotors during my 60,000 km Canadian brake warranty - and then switched to aftermarket pads. Been great ever since.