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I finally figured out why my brakes were pulsing after 10 years of turning rotors
Been doing brake jobs for about 15 years now and always just threw rotors on the lathe if they looked okay. Last month I did a pad swap on my buddy's 2012 Civic and the pulsing came back after maybe 500 miles. Turns out I wasn't measuring the runout with a dial indicator before mounting. Grabbed a cheap one from Harbor Freight for like 30 bucks and found one rotor was off by 0.008 inches. Slapped on new rotors instead of turning them and the pedal feels perfect now. What do you guys use to check runout or do you just replace them every time?
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gavin_clark9d agoMost Upvoted
...and that's the thing, I had a similar issue with my old F-150 years back. Turned the rotors, thought I was good, but I was fighting a vibration that just would not quit. Turns out I was over-torquing the lug nuts with a impact gun and warping the rotors that way. Had to buy a torque wrench and do the star pattern thing. Now I just do that and throw rotors in the trash if they look even a little funky, not worth the headache.
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