07-13-2018, 06:44 PM
I'm glad no one got hurt! It could have been deadly!
Thank-you for making this a learning opportunity for all of us for us to prevent it from happening with our wheels.
I know how it happened and how to avoid it. The solution is it takes a little more time when installing a wheel to prevent this. It's worth the time.
I've seen it before with one wheel that got away from broken lug nuts and another in the progress of the same. The one in progress held all of the clues.
Relating it to what happened with your wheel is the wallowed out holes on your wheel in picture three.
Here's how it happens:
1. The wheel was put on the studs and the first lug nut was tightened and it didn't center or maybe did and held the others off center.
(In particular don't do any of this: Especially bad is tightening up the first bolt tight with an impact wrench. Even worse is doing it with weight on the wheel that holds the wheel off center. Even when that is done with that lug nut centered, being tight, it can hold the other holes off center.)
2. The remaining lug nuts going onto studs not centered came to a firm stop on the edge of the hole without the taper on the lug nuts fitting into the mating taper on the holes in the wheel. No matter how much they were tightend in this position of the lug nuts not being seated, they will eventually fall into place when the wheel gets the right bump and then the lug nuts are loose.
3. The loose wheel bouncing around against the studs and putting on tremoundous force wallows out the holes in the wheel as it fatigues the studs until they break.
Here is the solution: (the main thing is not taking shortcuts and taking a little more time)
1. Always put on a few or all of the lug nuts with your fingers while watching that each seats into the tapered hole as you wiggle the wheel to feel it go in. Do that with the wheel fully up in the air.
2. Partly tighten each lug nut in a sequence that goes from one to the next on nearly the opposite side. Then repeat with a little more tightening while the wheel is still up in the air.
3. Partly lower just enough to stop it from turning as you tighten with a torque wrench twice with the first time less than proper torque and the second time with the torque wrench set at the proper torque as in the chart.
[signature]
Thank-you for making this a learning opportunity for all of us for us to prevent it from happening with our wheels.
I know how it happened and how to avoid it. The solution is it takes a little more time when installing a wheel to prevent this. It's worth the time.
I've seen it before with one wheel that got away from broken lug nuts and another in the progress of the same. The one in progress held all of the clues.
Relating it to what happened with your wheel is the wallowed out holes on your wheel in picture three.
Here's how it happens:
1. The wheel was put on the studs and the first lug nut was tightened and it didn't center or maybe did and held the others off center.
(In particular don't do any of this: Especially bad is tightening up the first bolt tight with an impact wrench. Even worse is doing it with weight on the wheel that holds the wheel off center. Even when that is done with that lug nut centered, being tight, it can hold the other holes off center.)
2. The remaining lug nuts going onto studs not centered came to a firm stop on the edge of the hole without the taper on the lug nuts fitting into the mating taper on the holes in the wheel. No matter how much they were tightend in this position of the lug nuts not being seated, they will eventually fall into place when the wheel gets the right bump and then the lug nuts are loose.
3. The loose wheel bouncing around against the studs and putting on tremoundous force wallows out the holes in the wheel as it fatigues the studs until they break.
Here is the solution: (the main thing is not taking shortcuts and taking a little more time)
1. Always put on a few or all of the lug nuts with your fingers while watching that each seats into the tapered hole as you wiggle the wheel to feel it go in. Do that with the wheel fully up in the air.
2. Partly tighten each lug nut in a sequence that goes from one to the next on nearly the opposite side. Then repeat with a little more tightening while the wheel is still up in the air.
3. Partly lower just enough to stop it from turning as you tighten with a torque wrench twice with the first time less than proper torque and the second time with the torque wrench set at the proper torque as in the chart.
[signature]