Checking Rotor Runout

[Sirlono]

I'd like to check the runout on my brake rotors before I do my brake job. Does anyone have a recommendation on a dial indicator, or is this something you usually have a shop do? Thanks all.

 

Dan

[cookie]

runout is rarely the problem. Check out the Stoptech website.

[1 Lucky Texan]

I agree with cookie. Unless there was an extreme issue with torque when the rotors were installed, any 'warp' feeling is more likely to actually be surface changes in the rotor alloy itself. better to get new rotors usually.

 

check www.stoptech.com the tehcnical white paper on the Myth of warped Rotors (IIRC)

 

Carl

[Sirlono]

So what I'm understanding is that when changing my brakes, if I'm not feeling any vibration under braking, then the only reason I would need to change the rotors is if they're too thin??

 

Dan

 

I agree with cookie. Unless there was an extreme issue with torque when the rotors were installed, any 'warp' feeling is more likely to actually be surface changes in the rotor alloy itself. better to get new rotors usually.

 

check www.stoptech.com the tehcnical white paper on the Myth of warped Rotors (IIRC)

 

Carl

[cookie]

That's pretty much it in a nutshell. I often get away with another set of pads on one rotor. The second set you are sort of taking your chances on.

[nipper]

if your pedal isnt pulsing, and steering wheel isnt oscilating when breaking, your rotors are fine.

 

nipper

[1 Lucky Texan]

yep - any little 'waviness' look on the rotor will wear into the pads after the first few stops so having them machined flat again, for most of us, is probably a waste of time.money and rotor material.

 

Carl

[Sirlono]

Thanks for all of your help. This will save me money on tools and unnecessary machining.

 

Dan