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Warped rotors = vibration at speed?

Originally Posted by gomer_110 A few things: 1. Rotors rarely actually warp. The phenomena that generally is to blame is brake pad deposits on the rotor face . Doing some

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Old 06-14-2018, 02:24 PM   #4 (permalink)
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Quote:
Originally Posted by gomer_110 View Post
A few things:

1. Rotors rarely actually warp. The phenomena that generally is to blame is brake pad deposits on the rotor face. Doing some hard braking from ~55 to 5 mph 5 or 6 times in a row and then allowing the brakes to cool without having the brakes applied at all may help.

2. Vibration at or above a certain speed with everything else being the same often indicates a wheel (or wheels) that are out of balance.

...
This.

Here is a good primer on the subject:

https://www.facebook.com/notes/power...5888830742846/

Depending on what kind of pads you have (abrasive or adhesive), it could indicate an issue with the tire (flat spot) where the rotor is getting additional buildup or wear from the pads. But more likely either wheel balance or perhaps a tire defect coming to light.

True rotor "warping" is very rare. They are typically cast. Cast things don't warp, they crack and break. But a lot of shops will tell you they are warped because it's easier to part you from your cash. And more profitable than removing and turning the rotors or diagnosing and solving the real problem.
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