ssdeuce

So I put new pads and rotors on bedded my brakes and cracked a rotor in the process so my question is do I need to bed my pads in again after I replace the rotor?

Thanks!

Gordy M

I was always told to bed the rotors with the old pads and then put in the new pads to continue the bedding process. Even then its a drive slow and gradually apply new bad material in the rotors, then some medium braking and finally start applying the brakes hard 4 or 5 time change pads and do it again.

Liquid1

Here's a very helpful article, with links to more related content at the end.

http://www.stoptech.com/tech_info/wp_bedintheory.shtml
http://www.stoptech.com/tech_info/wp_bedinstock.shtml

torque*is*cheap

Definitely...you want to transfer some pad materials to the rotors' friction surfaces. I like to do about five hard stops from about 80 mph to 30 mph...preferably at night on a deserted road!

JRitt@essex

Yes, you should do another bed-in. Here is a video and article I did on bedding in brakes (give it a minute to load, it is a substantial vid in high def). I discuss the theory, so it should be clear as to why you need to re-bed after watching it. Thanks.

Bill Dearborn

Have cracked many a rotor at HPDEs. I change the rotor and then go out and take it easy (.7 or .8) for 2 or 3 laps slowly working my way back up to speed.

Bill

RaleighSS

I have never herd of cracking a rotor in the bedding process .....

KNSBrakes

Kinda funny....

You may have went a bit overboard. But more likely it was the thermal shock to a new casting. With cast iron - especially the cheap stuff that most rotors are made from now...

-Warm it up slow - then keep it hot once it.s hot - and try to cool it evenly.

-Lesser heat cycles when new to slowly heat treat it.

It hates temperature differential, rapid temperature change or uneven heating.