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Old 09-12-2020, 02:02 PM   #2
SSDiv6
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Default Re: Broken Front Wheel Studs

Quote:
Originally Posted by Shadylane View Post
I have had a problem with front wheel studs breaking on my Fairmont. I have found 6 of them broken all the same way. I say found because they never break at the track, I find them on the shop floor after a race, usually 1 to 2 weeks after parking the car. They literally pop off the hub.
First time I suspected I had over torqued the lug nut, replaced the broken stud and torqued all the 1/2 lug nuts to the recommended torque 85-95, I use 85.
Previously I had used an insert on the wheel with a 12 point nut (See picture). After talking with Weld they recommended that I change to a shouldered lug nut which I did. Nothing changed, still breaking studs, sometimes the same one twice. The lug nuts are not bottoming out on the hub when tightened.
The hubs are Aerospace, studs are Moser. Lug nuts are from Weld.
I'm getting frustrated as I don't want this to happen going down the track!

Kelly Lane Stk 4991
From the pictures, it appears you have a very long stud and you may be stretching the stud beyond its yield point. Inferior fasteners will shear as shown in the picture when they are torqued beyond their yield. Therefore, I suggest you go with a shorter stud from either ARP, Mark Williams or Strange Engineering and shorter lug nuts. Also, looking at the cross section of the sheared stud, it appears to show inclusions, typical to inferior material or they may have been improperly heat or solution treated.
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