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RX - 4th Gen (2016-2022) Discussion topics related to the 2016 and up RX350 and RX450h models

Brake/rotor advice...

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Old Sep 27, 2025 | 08:21 PM
  #31  
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Originally Posted by LeX2K
Rotors do not get hot enough to warp not on a street car.
Warped rotors happened routinely to many drivers. If you want proof, drive for 45 minutes in stop-and-go traffic and then go straight into a car wash. Splashing cold water on hot rotors can warp them almost instantly.
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Old Sep 27, 2025 | 08:30 PM
  #32  
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That's an extreme case, the damage was way beyond warping.
Originally Posted by GreyfoxMT
I've worked on many a cars over 40 years... yes they will. The worse case I ever saw was at a gas station on Rt. 60 in Buena Vista, VA when some guy in a SUV came off the mountain and rode his brakes all the way down. The front discs were glowing red when he pulled in and they immediately started to warp and fracture.
And I've got two discs laying out in the back yard that have over 35 thousandth variance around the disc.

Last edited by LeX2K; Sep 27, 2025 at 08:36 PM.
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Old Sep 27, 2025 | 08:36 PM
  #33  
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Originally Posted by LeX2K
That's an extreme case, the damage was way beyond warping.
Ok... what ever. The rotors that I took off were not "extreme case".... and your opinion is noted.
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Old Sep 27, 2025 | 09:39 PM
  #34  
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Originally Posted by GreyfoxMT
Ok... what ever. The rotors that I took off were not "extreme case".... and your opinion is noted.
What was the run out spec?
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Old Sep 28, 2025 | 05:06 AM
  #35  
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Originally Posted by LeX2K
What was the run out spec?
Oh... so you missed the part of my post about 35 thousandths?

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