Garage Gurus | Brake Rotor Thickness Variation and Lateral Runout

Often misdiagnosed as a warped rotor, a pulsating brake pedal can have a different cause. Master Trainer Ryan Payne of Garage Gurus explains how a thickness variation in the brake rotor is the cause of the brake pedal pulsation and that lateral runout contributes to the disc thickness variation condition. On the vehicle, Ryan shows the tools and setup need to measure lateral runout and then demonstrates the test. He then goes on to give suggestions on how to resolve the issue. Count on Garage Gurus to help you get your vehicle repair done right.
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The content in this video is for informational purposes only. You should consult with a certified technician or mechanic if you have questions relating to any of the topics covered herein. Tenneco will not be liable for any loss or damage caused by your reliance on any content

[@cornpopthebaddude3992]

Awesome video ! Dealing with a runout issue right now I’ll have to check out this weekend . New rotors , new hawk hps pads , calipers , lines , bled the system . Brakes work great until they are hot,then I get a shaky steering wheel that gets worse with heat . Once cooled down , back to normal . I didn’t do the install so I’ll have to check the shops work .

[@carlodonnell146]

yes but how does the rotor start the wobble in the first place before the pads start to hit it ...doesnt it warp because of overheating brakes or overheating bearings maybe

[@henryoneil2870]

Pro-cut for the win

[@vusimavimbela8764]

❤you a good teacher sir thanks

[@mattalexhoward]

thanks for making this video

[@cornpopthebaddude3992]

Can worn suspension /bearings increase runout ?

[@ivanchina72]

Hi Ryan !!! Does Garage Gurus still giving classes to PepBoys employees ?thks

[@Karrpilot]

The flange surfaces need to be spotless. However, what I've seen is far too many guys will blast on a wheel with an impact wrench. Over torqued the fasteners. And unevenly too. Instantly ruining an otherwise good brake job. Another issue I've seen is guys improperly using those torque sticks. They are designed for right hand thread tightening ONLY. They are not designed for removal. As well as guys countlessly dropping said torque sticks, using super powerful guns on them, or not checking what the specific torque is. Just grabbing the torque stick that fits the lug nut. On my personal vehicles, I run the lugs down with my worn out 3/8 air ratchet. Then I do the final torque with my hand operated torque wrench. My brake jobs don't come back until it's time for new brakes again.

[@jacobclark89]

He has some good points . I think what causes warping is a hot rotor hitting a water puddle .

[@jeremy7991]

I am pretty sure everyone knows this, its just a lot easier to tell the customer they are warped. Don"t ya think?