Are my brake rotors ruined if they glow blue after bedding?
Performing hard stops slightly above target speeds during a brake-in procedure can cause new rotors to glow purple-blue. This leaves drivers unsure whether the intense discoloration indicates structural damage or merely heavy thermal stress from the bedding process.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Checking if braking feels normal and testing for adequate braking power
- 2having someone inspect the car in person
- 3visually checking the rotor condition
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“So today I installed some brand new rotors and brake pads and took the car out to bed the brakes in. Followed manufacturer steps, did 30 hard stops going from 30mph down to 5 and waiting 30 seconds in between. But I was doing 35-40mph. Came home to the front rotors glowing purple blue.”source ↗
“My car is making a high frequency squeaking noise on the back wheel when at speed but goes away with pressign breaks or while slowing down.”source ↗
“A mechanic shop told me to change the rotors and they pads. Do you think that the rotors are that bad? Or just changing the pads will solve the issue?”source ↗
Where this came up
People with this problem also raised
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