warped disc

[rpg]

So I removed the front left wheel on my '07 Silverado to check the brakes. I remove the caliper, caliper carrier and the small Torx screw holding the rotor to the hub. I re-install everything and after driving it today, I notice some noise while applying the brakes.

I disassemble and notice immediately that the rotor is warped. Did I assemble something wrong that would cause this?

The calper carrier bolts were clearly loctited so I used heat to melt the loctite before removing.

Geez, this is almost like working on a Chinese car or something.......

thanks,

RPG

[gmtech1]

How do know you the rotor is warped? Is there a pulsation/vibration when braking? Steering wheel shake when braking? How much heat did you use? If you applied extreme heat to the rotor, thats probably why its warped.

[rpg]

I used heat only on the caliper carrier bolts, not on the rotor itself. The rotor appears warped because when I place all the lug nuts on (no tire) and cinch it down to the hub and rotate, there is quite a bit of oscillation and it scrapes the caliper carrier.

And yes there's a pulsing of the brake pedal.

Mayb I assembled this wrong. there's a small Torx screw that cinches the rotor to the hub. Maybe someone can comment on the torque down sequence.

Appreciate it greatly,

RPG

[j cAT]

Originally Posted by rpg

I used heat only on the caliper carrier bolts, not on the rotor itself. The rotor appears warped because when I place all the lug nuts on (no tire) and cinch it down to the hub and rotate, there is quite a bit of oscillation and it scrapes the caliper carrier.

And yes there's a pulsing of the brake pedal.

Mayb I assembled this wrong. there's a small Torx screw that cinches the rotor to the hub. Maybe someone can comment on the torque down sequence.

Appreciate it greatly,

RPG

when removing rotors /drums you must wire brush /clean the mating surfaces of the rotor/hub components.. rust will cause the rotor/drum to have an effect of a distorted rotor/drum..

I use antisieze compound in very small amounts to coat this mating surface so that it will never rust and get damaged..

not familiar with the small torx that holds rotor to hub...

could be there to hold rotor on when being assembled.

[rpg]

J cat, thanks for that info. Thats usually my practice as well. I have stock in Anti Seize!

I'm going to figure this out tonight after work.

rpg