Rotor replacement bungle; pulsations

[Nayov]

I made a mistake while replacing the rotors (Raybestos Element 3) on my Fit. The hold down screws were too corroded to remove so I drilled those out, but I forgot to remove the remnants (the threaded part). I bolted on the wheel and spun it around only to notice that it wouldn't rotate smoothly and binding at a certain spot. I tore back into it and discovered my error. It was only one side, the driver's side was done correctly after discovering my error, but I now have a nice little pulsation while braking.

Question: Did I warp the rotor by bolting it down onto the protruding thread?

 

[Kira]

Possibly.
Did you also clean all mating surfaces thoroughly?

Years ago I found a 2002 Saab Linear Wagon from the state's legitimate "mountain country"; and where the owner lived was extreme.
By the time they sold the car, it had had 3 complete brake jobs.
Every bit was clean and new and [the correct parts] anti-seized.
The prettiest hubs you've ever seen.

 

[Rand]

did you clean all the hub surfaces with a wire brush etc?

doubt you "warped it"

What pads did you use?

 

[NibbanaBanana]

Yes, you probably warped the new rotor. If there was something in there between the hub and the backside of the mounting surface of the rotor like a broken off stud head and you torqued down the wheel, it probably got warped. Put an indicator on it and check it.

 

[Dave Hess]

did you clean all the hub surfaces with a wire brush etc?

doubt you "warped it"

What pads did you use?

Rust on hub can cause vibration.

 

[Rand]

Yes, you probably warped the new rotor. If there was something in there between the hub and the backside of the mounting surface of the rotor like a broken off stud head and you torqued down the wheel, it probably got warped. Put an indicator on it and check it.

I cant see a tiny stub of a screw nearly in the center of the rotor causing much warping. with lugnuts tightened properly.

While possible I think there are other likely suspects such as
If his screws were so corroded he had to drill them off.. my 2 cents is on hub rust etc.

or possibly a rotor that was out of spec right out of the box.

 

[Nayov]

Wagner pads. I think I may have to go back in and spend more time cleaning the hub as a Hail Mary attempt which looked remarkably clean so I spent hardly any time on that aspect, but I'm almost certain I did wreck that rotor. I've always used cheap no-name eBay rotors without issue and these are the first name brand rotors I've used.

 

[D60]

Cast iron doesn't take a set easily