IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

2016 IS300 Alignment Questions

Old Mar 10, 2024 | 02:00 PM
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Default 2016 IS300 Alignment Questions

I just installed the RR-Racing LCA Bushings on my car to minimize inner tire wear, then got an alignment done the day afterwards. The measurements for the passenger side are making me a bit anxious so I wanted to get some opinions. Does this imply that I need to change out something with my suspension? Should I get whatever's in the red, into the green or is it more complicated than that?

There's also times when I'm driving my car and tilting/slightly moving the steering wheel to the right makes it stutter, almost like there's notches or gaps in steering rack. This usually happens when I'm coming to a stop and angling my car to turn right( if there's space to do so), sometimes when I'm going around a bend on backroads too. Has anyone experienced this before? Do you think the bushings should help resolve this issue or would it be a separate matter entirely?


Last edited by Lokii; Mar 10, 2024 at 02:07 PM.
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Old Mar 10, 2024 | 02:41 PM
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Default Alignment

I also just installed RR Racing black bushings on my 2017 awd is300 earlier today. Drove the car about half hour to feel the car with the new bushings. My steering feels much better and the car tracked perfectly straight. I guess I’ll take it to get alignment, we can compare results.
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Old Mar 10, 2024 | 07:07 PM
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Originally Posted by Lokii
I just installed the RR-Racing LCA Bushings on my car to minimize inner tire wear, then got an alignment done the day afterwards. The measurements for the passenger side are making me a bit anxious so I wanted to get some opinions. Does this imply that I need to change out something with my suspension? Should I get whatever's in the red, into the green or is it more complicated than that?

There's also times when I'm driving my car and tilting/slightly moving the steering wheel to the right makes it stutter, almost like there's notches or gaps in steering rack. This usually happens when I'm coming to a stop and angling my car to turn right( if there's space to do so), sometimes when I'm going around a bend on backroads too. Has anyone experienced this before? Do you think the bushings should help resolve this issue or would it be a separate matter entirely?
Have you had the underside of the car inspected for issues? The caster being quite different along with the camber and your other comments makes me wonder if there is damage.
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Old Mar 11, 2024 | 12:09 PM
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Originally Posted by NYIS300awdFS
I also just installed RR Racing black bushings on my 2017 awd is300 earlier today. Drove the car about half hour to feel the car with the new bushings. My steering feels much better and the car tracked perfectly straight. I guess I’ll take it to get alignment, we can compare results.
Thank you for responding. Please let me know as I'm a bit curious about your results myself. I agree that the steering is much better (I also got the Street version) and I'm happy with the results, I just want to cover as many bases as possible to avoid/minimize damages.
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Old Mar 11, 2024 | 12:24 PM
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Originally Posted by arentz07
Have you had the underside of the car inspected for issues? The caster being quite different along with the camber and your other comments makes me wonder if there is damage.
When I first got the car, I was driving in the left lane & some ******* tried to merge without looking over his shoulders. He said he saw the car behind me and the car in front of me, but he didn't see my car, so he tried moving into the lane without a second thought. He ended up denting my fender and wheel while scraping my mirror cap, door handle and door itself. Insurance covered everything.

That was when the issues started, so I brought it to a Lexus Dealership near me and they said nothing was wrong with the underside so it was most likely the wheel. I brought it up with the repair shop and they said nothing seemed dented or damaged when they did the alignment so they assumed it was the wheel being warped as well. The new wheel helped but didn't resolve it entirely so I've been living with it. I assumed it was my LCAs themselves so when I installed the bushings I looked for any discrepancies, but they're uncannily clean compared to the rest of the underside & aren't damaged at all. My gut says its the steering rack but I honestly hope not. Do you have any suggestions for me to bring up if I get it inspected? If given the opportunity, I would like to fill the tech in on this knowledge to narrow down the issue.
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Old Mar 11, 2024 | 12:58 PM
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do you know what they replaced after the crash?
a bent strut, upper or lower control arm, knuckle can cause camber and caster to be out of spec
with camber that far out in front, i would think a bent knuckle, and strut
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Old Mar 12, 2024 | 06:56 AM
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Doesn't take much to bend something. If your wheel got tapped it is very possible the upper or lower control arm has damage. Having caster AND camber off leads me to the upper control arm being damaged. Personally, that is where I would focus. Easy to replace. Replace the upper control arm and hardware, go get it aligned and recheck again.
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Old Mar 12, 2024 | 06:57 AM
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Originally Posted by snowyblue
do you know what they replaced after the crash?
a bent strut, upper or lower control arm, knuckle can cause camber and caster to be out of spec
with camber that far out in front, i would think a bent knuckle, and strut
This could very well be as well.

Suspension issues after a small accident are the worst to troubleshoot as there are so many components and trying to find something slightly bent is damn near impossible.
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