Snapped the head off a lug bolt

[Matt@EuroJerks]

I snapped a head off a lug bolt at its collar and I now need to change my rotors. The bolt is flush with the rotor. I will be taking to a shop because I don't have the time & means necessary to get the bolt out. What should I order/replace other than rotors and pads?

[ShocknAwe]

Entire rear hub. Return it if the shop gets the bolt out.

[Dackelone]

Our cars have lug bolts. SO... why can't you just unscrew the threaded section off ? Or did you convert to studs and nuts ?

Maybe a photo would be helpful. ?

[JimD]

I'm surprised it sheared off. I've twice had a tire place put my wheels on so tight I needed a 4 foot pipe on a wrench to get them off. I would estimate 300-400 ft. lbs. The lug nuts (bolts?) still work fine - when tensioned properly to ~80 ft. lbs.

[Matt@EuroJerks]

Originally Posted by Dackelone

Our cars have lug bolts. SO... why can't you just unscrew the threaded section off ? Or did you convert to studs and nuts ?

Maybe a photo would be helpful. ?

Sorry, I am too lazy to host an image. The bolt has nothing past the rotor. It is sitting flush with it. I am pretty sure it is cross threaded too, hence the snap of the head off.

[Dackelone]

Originally Posted by Matt@EuroJerks

Sorry, I am too lazy to host an image. The bolt has nothing past the rotor. It is sitting flush with it. I am pretty sure it is cross threaded too, hence the snap of the head off.

Well... one you remove the brake rotor you can get better access to what's left of the bolt threads. Maybe use a buzz wheel to cut a slot at the end of the bolt and use a screw driver to remove it. Worse case... you will need a new wheel bearing & hub. But I would think most good shops know how to deal with this.

Replace ALL your wheel bolts. This should be done every few years anyways. Especially IF you track your car.


When you replace your brakes... you will also need new brake pad sensors. One per axle. I would also replace your brake fluid with new DOT4 brake fluid and have the shop pulse or purge the ABS block to get all the air out of the brake lines. Most scan tools have this function. And have the brake pad CBS system reset. You can go to my "DIY on resetting service due lights" on how to do this.

Good Luck,
Dackel

[Matt@EuroJerks]

Originally Posted by Dackelone

Well... one you remove the brake rotor you can get better access to what's left of the bolt threads. Maybe use a buzz wheel to cut a slot at the end of the bolt and use a screw driver to remove it. Worse case... you will need a new wheel bearing & hub. But I would think most good shops know how to deal with this.

Replace ALL your wheel bolts. This should be done every few years anyways. Especially IF you track your car.


When you replace your brakes... you will also need new brake pad sensors. One per axle. I would also replace your brake fluid with new DOT4 brake fluid and have the shop pulse or purge the ABS block to get all the air out of the brake lines. Most scan tools have this function. And have the brake pad CBS system reset. You can go to my "DIY on resetting service due lights" on how to do this.

Good Luck,
Dackel

Ok. Thanks.