Wheel Stud Cross Threaded/Stripped
Thread Starter
Cruising
Joined: Jul 2024
Posts: 10
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Wheel Stud Cross Threaded/Stripped
Hey all,
Went to replace my C8 brake pads today and that part went great, but unfortunately when removing the rear passenger wheel I had a hell of a time removing a lug and as expected, turns out the there was cross threading and the wheel stud is about 50% stripped.
It’s a real shame since I’ve never taken the wheel off myself on this C8 - only the dealership. How big of a PITA will be to be replace the stud? Rear.
Not sure how to best approach the dealer pointing a finger saying they did this and need to fix for free.
Went to replace my C8 brake pads today and that part went great, but unfortunately when removing the rear passenger wheel I had a hell of a time removing a lug and as expected, turns out the there was cross threading and the wheel stud is about 50% stripped.
It’s a real shame since I’ve never taken the wheel off myself on this C8 - only the dealership. How big of a PITA will be to be replace the stud? Rear.
Not sure how to best approach the dealer pointing a finger saying they did this and need to fix for free.
Racer
Joined: Mar 2023
Posts: 401
Likes: 137
From: Center Hill Al
Sr.Random input generator
Joined: Jan 2008
Posts: 7,777
Likes: 2,210
From: Sammamish, WA
My 2 cents:
I always use forged aluminum lug nuts for this very reason. When a mistake is made, the weaker lugs get damaged instead of your lug nuts. One been using cars at the track for more than a decade, and I've never damaged a lug, even though I've damaged quitea few lug nuts due to rushing, using wrong tools, etc...
I always use forged aluminum lug nuts for this very reason. When a mistake is made, the weaker lugs get damaged instead of your lug nuts. One been using cars at the track for more than a decade, and I've never damaged a lug, even though I've damaged quitea few lug nuts due to rushing, using wrong tools, etc...
Navigator
Joined: Nov 2023
Posts: 9
Likes: 0
@X25 specially what lug nuts do you recommend?
These???
https://www.bonoss.com/product/bonos...lazer-and-more
These???
https://www.bonoss.com/product/bonos...lazer-and-more
Sr.Random input generator
Joined: Jan 2008
Posts: 7,777
Likes: 2,210
From: Sammamish, WA
@X25 specially what lug nuts do you recommend?
These???
https://www.bonoss.com/product/bonos...lazer-and-more
These???
https://www.bonoss.com/product/bonos...lazer-and-more
Yes, I've been using Bonoss, and have been pretty happy with them. I usually get extra, and put a lug nut to the glove box as a backup, but I'm yet to strip anything. As a bonus, they're also very light.
I get the dimpled ones, and I also get them in silver, so they'd not look ugly after using impact gun which eventually scratches their paint. Since I change tires a lot, this becomes important : )
https://www.bonoss.com/product/bonos...-sr-mr-lr-2018
Pro
Joined: Feb 2021
Posts: 687
Likes: 177
Ideally the stud should be replaced with a press or tapped in with a hammer. If you drive it in with a nut you’re limited to 150ftlb of torque.
I have used aluminum lug nuts before on track applications. The forged lug concept is a bit misleading. Some are completely forged to shape with cold formed not cut threads. The later is more important. Can be a machined geometry with a cold formed thread. I’m not a fan for street use because they do wear out relatively quickly and are not the easiest component to inspect. Also aluminum does not have an infinite fatigue life so it’s not if, it’s when they will fail. When the the coatings wear it results in aluminum bearing on aluminum which causes galling. Never use any lubricant on wheel studs. This is the number cause for the type damage that has occurred in your situation.
I have used aluminum lug nuts before on track applications. The forged lug concept is a bit misleading. Some are completely forged to shape with cold formed not cut threads. The later is more important. Can be a machined geometry with a cold formed thread. I’m not a fan for street use because they do wear out relatively quickly and are not the easiest component to inspect. Also aluminum does not have an infinite fatigue life so it’s not if, it’s when they will fail. When the the coatings wear it results in aluminum bearing on aluminum which causes galling. Never use any lubricant on wheel studs. This is the number cause for the type damage that has occurred in your situation.
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No Hostility Be Happy
Joined: Aug 2018
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From: South Hill Wa
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
I bought one of these a couple years ago. It works ridiculously well. Way easier than pounding or pressing.
Pro
Joined: Feb 2021
Posts: 687
Likes: 177
These are limited to the maximum tensile load of the stud. If it is exceeded the stud will permanently elongate and will be damaged. Many times the damage is not visible. There is a reason studs are supposed to be installed from behind.
If the shoulder knurling on the replacement stud matches the original sometimes it requires a lower force to install and this type may work. Still not recommended. Even studs made by the same manufacturer can have enough of a difference in shoulder dims to require too much force to be pulled in.
If the shoulder knurling on the replacement stud matches the original sometimes it requires a lower force to install and this type may work. Still not recommended. Even studs made by the same manufacturer can have enough of a difference in shoulder dims to require too much force to be pulled in.
Last edited by Drew888; Aug 25, 2024 at 12:41 PM.
No Hostility Be Happy
Joined: Aug 2018
Posts: 10,012
Likes: 7,314
From: South Hill Wa
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
These are limited to the maximum tensile load of the stud. If it is exceeded the stud will permanently elongate and will be damaged. Many times the damage is not visible. There is a reason studs are supposed to be installed from behind.
If the shoulder knurling on the replacement stud matches the original sometimes it requires a lower force to install and this type may work. Still not recommended. Even studs made by the same manufacturer can have enough of a difference in shoulder dims to require too much force to be pulled in.
If the shoulder knurling on the replacement stud matches the original sometimes it requires a lower force to install and this type may work. Still not recommended. Even studs made by the same manufacturer can have enough of a difference in shoulder dims to require too much force to be pulled in.
That being said, have you ever personally used one of those ball bearing install tools? The amount of force on the threads is dramatically reduced by eliminating the friction of pressing against a stack of washers or a spacer.
Many of us also have enough experience to know when too much force is being applied and to take a step back.
Pro
Joined: Feb 2021
Posts: 687
Likes: 177
I have used similar tools. The bearing does nothing for the axial load. I’m an engineer and I run a company that develops and manufactures threads. My first job when I was just out of high school was as a tire installer for sears. I have seen it all.
I'm not disputing what you are saying at all. It is accurate.
That being said, have you ever personally used one of those ball bearing install tools? The amount of force on the threads is dramatically reduced by eliminating the friction of pressing against a stack of washers or a spacer.
Many of us also have enough experience to know when too much force is being applied and to take a step back.
That being said, have you ever personally used one of those ball bearing install tools? The amount of force on the threads is dramatically reduced by eliminating the friction of pressing against a stack of washers or a spacer.
Many of us also have enough experience to know when too much force is being applied and to take a step back.
Pro
Joined: Feb 2021
Posts: 687
Likes: 177
Pro
Joined: Feb 2021
Posts: 687
Likes: 177
Absolutely a stereo type. I knew you were joking, just wanted to inform those on this thread that I have had a tremendous amount of hands-on experience working on cars and motorcycles for a living. I deal with many engineers daily that have no practical experience they know the theory and not the application. Many don't even know the theory that well.
